INDEX TO KEYS Etc. BY COUNTRY Part 4 401 – 500

Australia:

401 04. 408. 411. 414. 415. 443 – 445. 447 – 450. 454. 456. 470. 475. 478. 480. 486 – 487. 489. 493. 498.

Germany:

419. Japan: 405. 458. 463. 472. 488. United Kingdom:

406 – 407. 410. 412. 451 – 452. 461 – 462. 473 – 474. 476 – 477. 479. 483 – 485. 494. 497.

United States:

409. 413. 446. 453. 455. 459 – 460. 464 – 469. 471. 481 – 482. 495 – 496. 499 – 500.

401. Australian ‘Clipsal’ brass key on black bakelite base measuring 116 x 72mm. ‘CLIPSAL’ embossed on front of base under black bakelite knob and ‘Made in Australia’ embossed underneath base. 2 terminals on right hand side of base. Large black bakelite skirt under knob. The holes on the left hand side and one on the right edge are not original and possibly had a mini buzzer wired to the key. Clipsal keys were made by Gerrard Industries, Adelaide, South Australia initially for the Royal Australian Air Force during WW2 and were popular with amateur radio operators after the war. Obtained from Canberra 2011.

402. Australian unknown semi automatic key. All nickel plated. Base 150 x 74mm. Similar layout as the Simplex Auto

except for the triangular pivot bridge. Damper post centre rear. Two identical black bakelite finger/thumb pieces. This appears to be an earlier version of this key. The latter having smaller and plainer terminal screws and triangular thumb piece and round finger piece. (See #421). Obtained from U.S.A. 2011.

403. Australian H. C. Ingram semi automatic key c1930s. All nickel plated. Base 145 x 75mm. Black bakelite finger/thumb pieces. Serial number 154 stamped under base. D. H. Clark C.T.O. Melbourne engraved on bridge. A person named Clark was in the 1942 Telegraphist Training Class, Melbourne in 1942 so this key probably belonged to him.

404. Australian PMG No. 4 Detector. Combined voltmeter and ammeter for portable testing. Development of Detector No. 2. Provided with 5 amp and 25 amp shunts which fit across terminals 2 and 4. Two 10,000 ohm resistance coil multipliers can be screwed singly or in series on the extended threads of terminals 2 and 3. Contained in leather pouch approx 105 x 120 x 65mm stamped PMG 4 with leather strap. Detector measures 90 x 72 x 50mm with 4 terminals and switch on top. Dial marked 0 – 50 AWA MODEL 55 MOVING COIL SER No. 1180109 TROPICAL. Zero adjust screw front centre bottom. Instructions with hanging hook on back.

405. Japanese BK50 Swallow semi automatic key. Black bakelite base arches and paddles approx 172 x 72mm. All metal parts mounted on the two arches. Base enclosed. Coloured red under base. Rubber suction feet. Label reads Swallow SEMI AUTOMATIC KEY MODEL BK50 TOKYO JAPAN DENTSU – SEIKI KK. Obtained from Germany 2011.

406. U.K. Royal Air Force key (used in Australia). Brown ebonite base 100 x 50mm with 4 wiring holes on left side

(two stamped E and E) and 2 at rear stamped R and R. Small arrow on right. 264 stamped on rear of bridge. Brown ebonite knob and skirt. Stamped underneath R.A.F REF 1969. These were possibly used as early as 1921 and certainly during WW2 so 1969 is a reference number rather than a date. Aluminium cover with glass insert in brass ring and adjusting screw for contacts.

407. U.K. wooden cased Q & I (Quantity and Intensity) meter (used in Australia). 85 x 97 x 52mm. Calibrated 0–70 each side, 3 brass terminals and ring holder on top. Inserts between terminals marked INTY. and QNTY. Back of case slides down to open and secured with small screw. Dial reads ‘TELEGRAPH WORKS. SILVERTOWN LONDON.’ Obtained from U.K. 2011.

408. 20 Ohm sounder wooden base 150 x 80mm. Brass fittings. Two terminals. Appears to have been made with parts from U.S. type sounders.

409. U.S. Bunnell polarised relay (used in Australia). Wooden base 193 x 108mm mounted on metal base

210 x 122mm. Large curved decorated permanent magnet holding 4 coils - two coils in each of the visible coil covers resulting in eight wires from the coils routed through eight holes in the wooden base; four to terminals 1 to 4 and four to join other coils. Terminals 5 and 6 are wired for a local circuit. Used in quadruplex and duplex working. Sliding switch mounted at right rear. Similar relay shown in Bunnell catalogue dated 1892. Obtained from U.S. 2011 and undergoing restoration.

410. U.K. replica cable key made by Phil Boyle (U.K.). Black plastic base 153 x 108mm. 4 feet 28 x 28mm. All brass fittings. Two keys with black plastic knobs and four terminals. Label under base reads GONVT TELEGRAPH KEYS PENKETH. ENGLAND. CABLE KEY. SER. NO. 10. Obtained from U.K. 2011.

411. Six Tasmanian colonial Post Office brass buttons 16mm diameter. Crown in centre with POST OFFICE TASMANIA around outside. Reverse reads HARRISON & SMITH.. Obtained from Hobart 2011.

412. U.K. iron vane galvanometer (used in Australia). Wooden base 100 x 100mm. Mounting hole at each corner and stamped PMG with below on front right corner. Brass terminal block at front with plug. Both brass arms underneath stamped T52. 65mm diameter former (stamped CB51U23 on rim) with covered wire wound around. Pointer mounted in well in centre. Brass back plate 55 x 35mm with two stops. Engraved SIEMENS Bro

s & C

o L

TD LONDON No.

20798. ↑ above (dates the galvo post 1880). Glass dome 75mm diameter, 82mm high. Rubber dust ring around base of cover.

413. U.S. replica of Coffe key made by Phil Boyle U.K.. Coffe was the inventor of the first Mecograph semi automatic

key. Only one known Coffe key in existence. Wooden base of American White Oak with striped grain pattern known as Tiger striping. Base measures 2017 x 115mm with steel base cover (original was Lead). Main arm and ‘gallows’ stainless steel and other fittings nickel plated brass. Large round ball weight. Small circuit closer on front right. Black plastic finger and thumb pieces. Main label reads the MECOGRAPH W. O. COFFE 115 KETTERING ST. CLEVELAND O. PATENT PENDING. Second label reads GONVT TELEGRAPH KEYS PENKETH ENGLAND W. O. COFFE SER. NO. 10. Obtained from U.K. 2011.

414. Australian Simplex Auto semi automatic key. S#3032. Copper plated (normally would be expected to be nickel

plated) base 151 x 77mm with nickel plated bridge. Label reads THE SIMPLEX AUTO No 3032 (REGD) MANUFACTURED BY LEO G. COHEN TELEGRAPHIST C.T.O.. MELBOURNE. VIC. Black bakelite finger/thumb pieces. This would be one of the last C.T.O. models as 3025 is not a C.T.O. With out of order number it was possibly made at the changeover period from one model to the next.

415. Australian Codemaster semi automatic key. S#532. Black wrinkle paint metal base 150 x 75mm with all plated brass fittings. Black bakelite finger and thumb pieces and circuit closer knob. Very similar to Simplex Auto. Bridge measures 140 x 37mm. Central damper and wire spring clip on vibrator weight. Label on bridge reads Codemaster and label under base reads B.M.R. PRODUCTS 69 PACIFIC HWY WAITARA N.S.W. S/N 532. Obtained from Sydney 2011.

416. Australian Unknown semi automatic key. Black wrinkle paint metal base 163 x 93 x 30mm. Black bakelite finger and thumb pieces and circuit closer knob. Unusual spring winder. Although larger than a Pendograph there are so many similar features that it is possible this is an unknown Pendograph model.

417. U.K. Marconi PS213A (PS. = performance specification) radio key. Dark brown ebonite base 150 x 85mm. 3 terminals at rear marked 1 2 3 from right to left. Two rear frames marked 1 on right and 3 on left. 2 marked in front of anvil on right. Dark brown ebonite knob and skirt. Plated brass fittings. No markings. Very long arm. In 1950 the tongue was shortened and the ‘leg’ of the rear frame faced backwards making this pre 1950. Production ceased 1982. Said to have been used on Royal Australian Navy vessel during WW2. Obtained from Sydney 2011.

418. U.K. submarine cable key (used in Australia). Ebonite base 155 x 110mm. Stamped in front ELLIOTT BROS

LONDON and SAUNDERS SIGNALLING KEY. Ebonite knob. All brass fittings. Circuit lines on base connect left key to rear right back terminal and right key to rear right front terminal. Front left terminal marked L connects to base of left anvil. Front right terminal marked E connects to base of right anvil. Rear front left terminal connects to rear contact of right key. Rear back terminal connects to rear contact of left key.

419. German ohm meter in wooden case 85 x 53 x 33mm. Two terminals on top (- and +) one adjuster on base. Dial

reads on left 8 50 20 10 5. 2 in centre and 1 0 on right. Above is k Below is x 100 and bei 120V. On right hand side is +120V with socket and left side – 120V. Measures low ohms with internal battery and higher values with a 120V external battery. This instrument used at Peenemunde during WW2 by Erich Kanngieser, father of Horst Kanngieser who worked for Siemens in Australia during 1970s.

420. Australian ‘in line’ Pendograph. 4th model. Grey painted (possibly not original - usually nickel plated) metal base 112 x 83mm. Round label right hand side reads ‘MACDONALD’S PENDOGRAPH PATENT 11389 ADELAIDE. S. A.’ Vertical pendulum at rear with one weight and rubber bumper. Two red compressed vulcanised fibre thumb and finger pieces. Nickel plated brass fittings. Long dot and dash arms. Terminal screws on right rear base and right frame upright.

421. Australian unknown semi automatic key. Black painted base 152 x 75mm. Similar layout to the Simplex Auto except for the triangular pivot bridge. All plated brass fittings. Damper post centre rear. Two identical black bakelite finger/thumb pieces. This appears to be a later version of #402: the earlier having different terminal screws. Some models may have had round finger pieces. See also #402.

422. U.K. 150 ohm relay (used in Australia). Black metal base measures 210 x 125mm. Wooden base measures 192 x 103mm. All brass fittings 2 terminals at rear and 2 at end. Label reads Walters Elec

tl MFG C

o L

TD

MAKERS 75ω + 75ω (in box) London. Stamped under wood base S123/19 and 01973/33.

423. U.K. automatic or electro Magnetic switch. (used in Australia). Used in double current working. Wooden base measures 195 x 132mm. 4 coils. All brass fittings. Brass base measures 153 x 93mm. Brass base stamped SIEMENS BROTHERS LONDON N

O.1178. (this dates the switch prior to 1880). Stamped 2 on base near left

armature and 1 on base near right armature. Stamped 15 under brass base. In its normal position it must place the line in connection with the repeating instrument so that the currents from that line may be ‘repeated’ along the other line and when it is required to transmit to the wire to which it is joined, the switch (controlled by currents sent from the other line) must disconnect its repeating instrument and join up the batteries, maintaining these connections so long as a message is being sent.

424. U.K. dummy key. Wood base measures 100 x 72mm. Brass plate measures 85 x 57mm. All brass fittings and bakelite knob. Plate marked rear left with within what appears to be a conjoined C and T. Stamped KEY DUMMY SIGNALLERS MkII PARKINSON & COWAN L

TD 1919 N

o 24346 with below. No contacts and used for

practice by military members.

425. U.S. sounder (used in Australia). Wooden base 140 x 78mm stamped 40 twice between 2 rear terminals and PMG with below on front left. Brass fittings except steel striker bar stamped J. H. Bunnell & C

o NEW YORK.

U.S.A. 2 terminals at rear. Vertical spring.

426. U.K. relay. Wooden base 193 x 133mm. All brass fittings stamped 55 underneath. Brass base 155 x 95mm. 2 long (83mm) coils. Wood base stamped 806 PMG RESISTANCE 250 OHMS. 2 terminals back and side. Possibly made by Siemens.

427. U.K. miniature key similar to miniature keys used in spy radios. Brown ebonite base 53 x 31mm. Black bakelite knob and sheath to arm. Should have bakelite cover. Said to have been retrieved from disabled British tank at ‘Marble Arch’ Libya in 1946 by Ernie Sloman, then RAF signaller. Similar keys e.g. Muirhead B2 keys used in spy radios.

428. Australian section switch. Black ebonite base measures 130 x 66mm. 6 brass blocks each measuring 35 x 30mm and overall 112 x 64mm. Bottom centre block stamped P.M.G. 11401. 2 black ebonite topped brass plugs.

429. Australian section switch pre 1900. Black ebonite base 120 x 77mm. Steel bars total measurements 95 x 68mm. 5 bars marked U (up line) D (down line) on top two and lower two I I (instruments). Both outer bars marked E (earth ) with 1758 below on left and right, E with P.M.G. below. 2 steel screw plugs with ebonite caps. Each screw head stamped B and B (twice) under ebonite base. Unusual for section switches to have steel fittings; usually brass. Used widely in Victoria.

430. U.S. morse register – inker, clockwork driven. Black metal base 270 x 127 x 130mm. with three sets of numbers (almost unreadable) stamped underneath. All brass fittings. Two terminals front right. Stamped J. H. Bunnell and C

o NEW YORK U.S.A. 1696. Wire rod tape holder right front. Large brass winder key. See #693 for

instructions.

431. Japanese navy key. Black bakelite base 155 x 85mm. Black bakelite knob and skirt. 3 terminals at rear. Label on front of base reads 12 3 (translates to March 1938) No. 352 600. Under skirt 2018A-14

432. U.K. Increment or single current transmitter used in Duplex and Quadruplex working. Black metal base 212 x 112mm. Wood base 184 x 97mm. All brass fittings. 2 coils. 5 Terminals.

433. U.K. R.A.F. No 1 key. c1924. Wooden base 129 x 70mm with inserts in both front and back which is typical of Marconi manufacture, but stamped on front of base GAMAGE LONDON 2290. 2 terminals at rear and 2 on right side with lamp. Black bakelite knob and skirt. All brass fittings. Heavy duty contacts. Lamp probably fitted, as noise in aircraft would drown key sounds and lamp would make operator aware that a signal was being sent.

434. U.S. sounder. Wooden base 140 x 73mm. 20 stamped at rear between 2 terminals. All brass fittings. Vertical spring. Non matching knurling on terminal screws. No other markings, but similar to Bunnell sounders.

435. U.S. relay. Black metal base measures 153 x 91mm. Wooden base measures 142 x 83mm. Stamped small 7 and large 2 and 112 and 50 ohms. All brass fittings. Armature mounting plate stamped MANHATTEN ELEC SUPPLY Co NEW YORK within oval.

436. U.K. galvanometer c1870. Wooden base measures 100 x 100mm. Brass back plate stamped and below SIEMENS BRO

s & C

o LONDON N

o 11635. (This

dates the galvo prior to 1880). Former (section that carries windings) stamped ROC 390. 2 brass terminals stamped 77 underneath. 45mA FLC. Glass dome cover with rubber dust ring.

437. U. K. galvanometer c1870. Wooden base 100 x 100mm. Brass back plate stamped and below SIEMENS Bro

s & C

o LONDON N

o

14517. (This dates the galvo prior to 1880). Former stamped 50ω.

2 brass terminals with 98 stamped underneath and on both. 45mA FSD. Glass dome cover with rubber dust ring.

438. U. K. Navy all brass key c1920s. Wooden base 152 x 75mm. Stamped in front PATT. 1056. A. Arm embossed

WE8208 . Black bakelite knob. 3 terminals.

439. U.K. all brass key. Wooden base 110 x 80mm with 15393 stamped under base. Black bakelite knob and circuit closer knob. Arm stamped VK 2HM (amateur radio call sign) indicating previous owner. Anvil stamped 15393 SIEMENS BRO

s & C

o This dates the key prior to 1880. Two terminals.

440. Australian replica of key at #250 made by Ric Havyatt (SK). Larger than original size Black bakelite base

150 x 97mm. Nickel plated brass fittings. Black bakelite knob. 1 terminal at left front of arm and one on left anvil.

441. U.K. Air Force key Type D. Heavy key on alternative ebonite base 182 x 100mm high, all brass fittings. Brown

bakelite knob. Bakelite cover is missing. Brown bakelite knob and skirt. Has heavy spring mounted electrical contacts. As lever is depressed the 1½" silver contacts close and at the same time wipe diagonally against each other. This makes a more reliable contact and may reduce contact arcing. (See #107 and Australian version at #364).

442. Australian all brass key. Wooden Huon pine base 126 x 76mm with 2 terminals from Ericsson phone at rear.

Black bakelite knob. Made by Ric Havyatt (SK) Sydney NSW.

443. Australian Resonator box and stand. Wooden base measures 165 x 165mm. Wooden resonator box measures 155 x 122mm. Metal fittings. This style was used by N.S.W. Government Railways, but no markings. Contains sounder #444, see below.

444. Australian sounder. Black wooden base measures 140 x 75mm and stamped 900 ohms between 2 rear terminals. All steel fittings. Horizontal spring. Used by N.S.W.G.R.

445. Resonator box and stand made to P.M.G. drawings by Ric Havyatt (S.K.) Black metal base 145mm square. Box 178 x 148 x 199mm high. Contains sounder #446, see below.

446. U.S. Sounder stamped on striker arm J. H. Bunnell & Co. New York U.S.A. Wooden base 140 x 76mm stamped 1000. Brass sounder base plate marked 5 underneath. Shunt at rear in front of 2 terminals makes it 900Ω. Vertical spring.

447. Australian CMOS Super Keyer. Black metal box 135 x 132 x 40mm. Stickers on front top ‘CMOS Super Keyer II’ and large WIRELESS INSTITUTE OF AUSTRALIA logo. Wooden strip marked 1 2 3 4 above 4 buttons. Dial at front. At rear 3 large sockets marked PADDLE KEY STRAIGHT CHARGE XMTTR and 1 small one. For iambic sending. Will store short morse messages. Has accompanying instruction book.

448. Australian transistorised oscillator for practice.

Wooden box 135 x 101 x 56mm. 2 terminals bottom left. Label on top VK2PH. Made by Ric Havyatt (SK).

449. Australian learner key. c1940. Wood base 113 x 68mm. Steel fittings. Black bakelite knob. Made by Buzza

Products, Sydney. 2 terminals towards rear on left and right hand sides. Written under base by Ric Havyatt ‘Buzza Products Ltd. Buzza steel lever morse key c1940’.

450. Australian keyer. Black metal base 123 x 65mm. Twin black plastic paddles. Made by Wes Tyler (SK).

451. U.K. double paddle iambic keyer. Black metal base 112 x 76mm. Label reads KENT (within box) ARLETON PRESTON PR4 6YB UK. Twin black plastic paddles.

452. U.K. differential Cathedral galvanometer. Wooden case 139 x 90 x 180mm with 14426 stamped on front of

base. 2 brass blocks and 2 brass plugs in front. 4 terminals on blocks. 4 large terminals at rear. Dial reads 70 both left and right. PMG stamped right side of base behind block .

453. U.S. Black oval base key mounted on wooden base 139 x 77mm. Brass fittings. 2 terminals at rear. Black arm and black bakelite knob. Brass connections under base.

454. Australian learner key. Wood base 132 x 70mm. Wood knob and skirt. All brass fittings. 2 terminals at rear. Made by Ric Havyatt (SK).

455. U.S. brass oval base key. Black metal arm and black bakelite knob and circuit closer knob. Brass fittings. 2 terminals at rear. Stamped MESCO in oval box on base.

456. Australian key, wood base 108 x 69mm. All brass fittings. Arm and anvil painted gold colour. 2 terminals at left.

Possibly made by Buzza Products, but has black Clipsal knob.

457. Australian key, black bakelite base 90 x 68mm. All plated brass fittings. 2 terminals at rear. Black bakelite knob.

Very similar to Levenson’s Radio key but no markings. Slightly longer arm (112mm) and different shaped base than Levenson – See #487.

458. Japanese key, ebonite base 90 x 67mm mounted on wood base 130 x 90mm. Black bakelite knob and skirt. 2 terminals at rear. Metal strip from arm to anvil on right hand side. Stamped MADE IN JAPAN at left rear of arm and a hand holding a T and N

o 1100 closer to knob.

459. U.S. Signal Corps oval base key with circuit closer. Brass fittings. E F JOHNSON WASECA MINN stamped on back and 590-0 under. Steel arm and circuit closer keeper. Black bakelite knob and circuit closer knob. Mounted on black plastic base 120 x 75mm.

460. U.S. army black moulded key . Oval base marked on left J-37 and on right 11 in circle. Metal arm with black bakelite knob. 2 terminals at rear.

461. U.K. army polarised sounder used in Tyer baseboards sets which comprised double current key, galvanometer, relay and sounder. Contained in wooden box measuring 158 x 10 2x 132mm. Box marked 13 C 14 on back. Stamped on top front of lid. Sounder has dark brown ebonite base 140 x 75mm with all brass fittings. Side of base stamped A.T.M. C

o L

TD 1918 5237. 3 terminals at front marked S.T.M. (space, tongue, mark) and 2

terminals at rear. Horizontal spring.

462. U.K. army polarised sounder used in Tyer baseboards sets which comprised double current key, galvanometer,

relay and sounder. Contained in wooden box measuring 160 x 102 x 132mm. Box marked 13 C 16 on back. Sounder has dark brown ebonite base 140 x 75mm with all brass fittings. Side of base stamped A.T.M. C

o L

TD

1918 5408. 3 terminals at front marked S.T.M. (space, tongue, mark) and 2 terminals at rear. Horizontal spring.

463. Japanese Hi Mound semi automatic key, BK100. Bakelite with metal fittings. Black base measures 175 x 76mm with JAPAN marked on back. Scale on front left marked 0 – 10 S←SPEED →F. Single black finger/thumb piece. Flat pendulum with vertical round weight. Two terminals on front right hand side. Five ribbed clear plastic cover cracked on rear left corner. Also has original box and instruction sheet.

464. U.S. Dunduplex all nickel plated semi automatic key. Base measures 135 x 75mm. THOS J. DUNN & Co PAT’D 1909 NEW YORK DUNDUPLEX 5043 stamped on base. Two terminals at rear single black bakelite round finger/thumb piece and circuit closer on front right with black bakelite knob. Two buttons on top for dots and dashes. Open base underneath. Contained in original tin which measures 178 x 80mm and marked under base DUNDUPLEX MADE BY THOS D. DUNN & CO. No.1 BROADWAY N.Y.. Handle of tin is missing and top of tin has been painted by a previous owner. See also #84, #86 and #465.

465. U.S. Dunduplex all nickel plated semi automatic key. Base measures 135 x 75mm. THOS J. DUNN & Co PAT’D 1909 NEW YORK DUNDUPLEX 3024 stamped on top of base. Two terminals at rear single black bakelite round finger/thumb piece and circuit closer on front right. Two buttons on top for dots and dashes. H BUTLER BOX HILL stamped on base. Closed base underneath. See also #84, #86 and #464.

466. U.S. Vibroplex Vibrokeyer c1960. Beige metal base 115 x 90mm. Frame, pivots, lever and contacts are from the ‘Original’ model with a small Phillips head screw filling the tapped hole in the left arm where the dot lever stop screw would have been. Label on right hand side has Vibroplex logo, stamped No.272607 and reads TRADE VIBROPLEX MARK THE VIBROPLEX COMPANY. INC. 833 BROADWAY. NEW YORK. N.Y. 3 terminals at rear. Red finger and thumb pieces.

467. U.S. polarised relay black metal base 195 x 105mm. Large curved decorated permanent magnet holding 4 coils — two coils in each of the visible coil covers. Wooden base measures 210 x 120mm, stamped PMG VIC and 82 on left hand end. All brass fittings. 6 terminals at rear. 400 ohms.

468. U.S. all brass oval base key c1875. Black bakelite knob and circuit closer knob. Metal circuit closer keeper. Brass arm stamped PARTRICK & CARTER who were in business 1876 – 1897. The practice of pushing a steel fulcrum through the brass lever was discontinued 1870 – 1880 as steel pins tended to come loose. This may be a hybrid key.

469. U.S. sounder. Wood base 142 x 72mm, stamped 4(Ohms) between 2 rear terminals. Striker arm stamped J. H. BUNNELL & Co NEW YORK. U.S.A. Brass plate stamped PAT MAY 7 1895. Vertical spring.

470. Australian army key WT 8 AMP No 2. Black bakelite base 90 x 42mm. Stamped on back KEY. WT. 8 AMP N

o 2

and underneath P.M.G. 1941 in circle. Steel fittings. Black bakelite knob. Arm stamped ↑ with 283 under and PMG 1941.

471. U.S. black moulded oval base key. Steel lever with Black bakelite knob. No circuit closer. Marked on left J-41-A in frame and on right 1. 2 terminals at rear, one on right hand side. Extra set of normally closed contacts at rear for use in TG-5-A and TG-5-B field sets. Both open and closed contacts (n/o and n/c) front and rear. Quite a rare key.

472. Japanese learner key. Black bakelite base 81 x 46mm. All metal fittings. 2 terminals at rear. Black bakelite

knob.

473. U.K. 20 ohm sounder. Wood base 132 x 85mm. Rear stamped SILVERTOWN LONDON E. All brass fittings. Black stands underneath. 2 terminals at rear. Horizontal spring. Written under base 4086.

474. U.K. sounder. Wood base 131 x 86mm. Rear stamped SILVERTOWN LONDON E. Stamped Q G (Queensland

Government) in oval box 139 20ω. All brass fittings. 2 terminals at rear. Brass stands underneath. Horizontal spring.

475. Australian navy key (Type D) contained in cast aluminium case with lift up lid 172 x 102 x 73mm. Ebonite base 133 x 89mm. Mica plates between key base and case and above contact. Plate on key reads ROYAL AUS. NAVY WIRELESS TEL. & ELECTRICAL WORKSHOPS RANDWICK NSW NO. 2426. Heavy silver contacts and Randwick Workshops would indicate spark transmitter use, so probably c1920.

476. U.K. 900 ohm sounder. Wood base 131 x 84mm. Stamped P.M.G. 1000Ω at rear between 2 terminals. All brass

fittings. Brass sounder plate stamped THE MARCONI SCIENTIFIC INSTRUMENTS Co L

TD. Black stands underneath.

2 terminals at rear. Horizontal spring.

477. U.K. 20 ohm sounder. Wood base 131 x 85mm. Stamped 289 on front. A.T.M. (Automatic Telephone Manufacturing Co. Ltd) metal label between 2 terminals at rear. Under base stamped P223. Black stands underneath. Horizontal spring.

478. Australian Simplex Auto semi automatic key S#5678. Black wrinkle paint base 151 x 76mm. Sloping bridge with plate reading THE SIMPLEX AUTO N0 5678 (REGD.) MANUFACTURED BY LEO. G COHEN MELBOURNE VIC. Pivot screw under base. Damper at rear left. Round pendulum and weight. Black bakelite finger thumb pieces.

479. U.K. cathedral galvanometer. Wooden base 137 x 69 x 180mm. Dial reads TELEGRAPH WORKS SILVERTOWN

LONDON. Stamped on front left of base C G in oval box (Indicates crown colonies (possibly Queensland) so

pre 1901) and on right 118. 2 terminals at rear.

480. Australian oval base metal key. 2 terminals at rear. Arm stamped BUZZA PRODUCTS SYDNEY. Black bakelite knob and circuit closer knob. Copy of U.S. Signal Corps J37 made for U.S. forces in Australia during WW2.

481. U.S. Signal Corps black moulded oval base key. 2 terminals at rear. Black bakelite knob and skirt. Marked J 37 (in circle). Mounted on black plastic base 116 x 75mm.

482. U.S. 900Ω sounder. Wooden base 140 x 75mm stamped 900 with brass label WESTERN ELECTRIC COMPANY. Shunt underneath. All brass fittings, vertical spring. Steel striker arm. Two black Bakelite covered coils.

483. U.K. BPO relay c1890. Wooden base 130mm diameter, 140mm high. Brass cylinder with glass opening top.

Terminals D U S T M. Adjusting knob on right of case which is marked SPACING MARKING

above knob. Top of cylinder under glass is stamped G.P.O. G. indicating G relay used on differential duplex circuits.

484. U.K. BPO polarised relay. Wooden base 127mm diameter, 136mm high. Brass cylinder with glass opening top

(small broken section). Terminals D U S T M. Connecting brass strip between and U. Adjusting

knob on right of case which is marked SPACING MARKING above knob. Top of cylinder under glass is stamped N

o 569 H. W. SULLIVAN LONDON. Under base marked 100 over 100 (coil resistance) and scratched

697

485. U.K. polarised relay. Known as ‘Siemens relay’, for use on short lines. Wooden base 147mm diameter

and stamped 9817. 97mm high. Glass cover 95mm diameter and stamped under REID BROS LONDON. N.

4 brass terminals marked D U T M. 2 coils with large magnet.

486. Australian sounder, black wood base 138 x 75mm and stamped 20ω between 2 rear terminals. All metal fittings. Horizontal spring.

487. Australian ‘Levenson Radio’ learner key, black bakelite base 94 x 72mm. 2 terminals at rear. Black bakelite

knob. All brass plated fittings. ‘LEVENSON’S RADIO 226 PITT STREET SYDNEY’ embossed under base. Arm 94mm long. #457, #487 and #577 all have the same characteristics, but none exactly the same.

488. Japanese Hi-Mound HK702 key. Metal base 115 x 60mm on marble base 129 x 71mm with lower plastic base

145 x 88mm. Chromed fittings. Two terminals at rear. Black bakelite knob and skirt. Clear plastic cover marked HIMOUND. Lower plastic base marked TELEGRAPH KEY HK-702 HI MOUND ELECTRO CO. LTD. HI MOUND JAPAN stamped under lower base.

489. Homemade semi automatic key. Slate base 184 x 89mm. Single black bakelite paddle. Wiring on top.

2 terminals on right.

490. Australian Automorse fully automatic key. Right hand model. Metal base 143 x 93mm rounded corners. T frame. Dot pendulum has weight attached to dot spring with one other weight. Auto dash bar pendulum to right has one large parallel weight and one slightly smaller cross weight with very long flat contact strip to left. Black plastic paddles, but should be compressed vulcanised fibre material. Label on front right reads HITCHCOX BROS MAKERS PAT. No 7023-18 K. P. THOMAS ADELAIDE. Obtained from Sydney 2011.

491. Australian miniature relay. Two layered ebonite base 140 x 75mm marked at armature end T729022. To the

left three terminals marked 1 2 3 and line terminals marked 4 and 5. Re3 marked between these. Two coils marked T747399.0. All steel fittings.

492. Australian Buzza double lever semi automatic key. Base measures 171 x 99mm. Label reads AUTOMATIC KEY No. 100 MADE IN AUSTRALIA By BUZZA PRODUCTS. Red compressed vulcanised fibre thumb piece. Black bakelite finger piece and circuit closer knob. Two terminals on right hand side.

493. Australian Buzza single lever semi automatic key. Base measures 171 x 99mm. Label reads AUTOMATIC KEY No. 100 MADE IN AUSTRALIA By BUZZA PRODUCTS. Red compressed vulcanised fibre thumb piece. Black bakelite finger piece and circuit closer knob. Two terminals on right hand side. Frame for bumper at rear.

494. U.K. brass key. Wooden base 108 x 84mm. All brass fittings. Black wood knob and circuit closer knob. No jigger jack. Anvil stamped SIEMENS BROTHERS & C

o LIMITED LONDON. This dates the key post 1880.

2 terminals left hand side.

495. U.S. ‘Lionel’ J36 semi automatic key. Black wrinkle paint base 161 x 88mm. WW2 era. S#25180. Bridge type damper with flat pendulum marked 1 – 0 and square weight. Two terminals on right hand side. Black bakelite finger/thumb pieces and circuit closer on front right. Label reads SIGNAL CORPS U.S. ARMY KEY. TYPE J-36 ORDER NO. 7861PHLA 1942 Lionel logo centre and MADE BY THE LIONEL CORP. NEW YORK SERIAL NO. 25180. Portion of the original label is still held, but a replacement has been added to the machine.

496. U.S. 150 ohm relay. Black cast iron base 204 x 121mm. Wood base 185 x 105mm. Stamped PATD and under base 12500. Plate on base reads WESTERN ELECTRIC COMPANY. May have been made by B I & H C. See #497.

497. U.K. 150 ohm relay made by B I & H C, Liverpool UK (small round label near local terminals). Black cast iron base 205 x 120mm, stamped X989 underneath. Wood base 190 x 98mm, stamped PMG top left and R651 underneath. Small label 150, representing 150 Ohms. British Insulated & Helsby Cables was an associate of Western Electric and went out of business in 1907 (amalgamated).

498. Australian black oval frame key. Wood base 239 x 75mm. Label reads EXPANSE in centre of diamond shaped frame and around frame AUSTRALIAN MANUFACTURER REGISTERED TRADE MARK. Made by AWA about 1922-23. 2 terminals at rear.

499. U.S. Vibroplex ‘Lightning’ semi automatic key. Black wrinkle paint base measures 162 x 87mm. Bridge type

damper, two terminals on right hand side with circuit closer with black bakelite knob. Black bakelite finger/thumbpieces. Flat pendulum numbered 1 to 0 with square weight. Type D8 plate (833 Broadway) c1942. S#120792.

500. U.S. Vibroplex ‘original’ semi automatic key c1943. This is not a common model. Black wrinkle paint base

161 x 89mm. S#124625. D5 plate 833 Broadway. Black bakelite finger and thumb pieces and terminal screws. One weight. Square shouldered frame. Carry case measures 230 x 110 x 110mm and stamped on side MARTHA RAHZ. Unusual hinges on box – usually long thin hinges.

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