General Information

Serial #

C-811

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

WOODEN BOX WITH METALHARDWARE/ TELEGRAPH SET & HEADPHONES - METAL AND SYNTHETIC, Ebonite, Bakelite

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

30.0 cm

Width

17.0 cm

Height

17.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Telegraphy

Sub-Category

N/A

Manufacturer

AKA

NORTHERN ELECTRIC

Country

Canada

State/Province

Québec

City

Montréal

Context

Country

Canada

State/Province

Unknown

Period

AFTER 1941

Canada

Unknown

Function

DESIGNED TO SEND AND RECEIVE TELEGRAPH SIGNALS THAT COULD NOT BE OVERHEARD BY LEAKAGE OF INDUCTION AND COULD BE CARRIED ON THE SAME LINE OVER WHICH A TELEPHONE CIRCUIT WAS WORKING. INTENDED FOR WARTIME USE. [REF 2]

Technical

EXAMPLE OF A METHOD OF COUNTER-ESPIONAGE. WAS USED TO AVOID ENEMY EAVESDROPPING THROUGH TWO WORLD WARS. THE MARK VI VERSION WAS THE LAST BUILT AND WAS FULLY TROPICALIZED.

Area Notes

Unknown

Details

Markings

.1 PRINTED ON FRONT: 'FULLERPHONE MK IV/ NO C-811/ N.E. CO. 1941/ BUZZER/ CHOPPER/ POTENTIOMETER/ PHONES'/.2 NO MARKINGS/ BOX: INSTRUCTION PLATE ATTACHED TO INSIDE LID TITLED: 'INSTRUCTIONS/ FOR USING FULLERPHONE'/ LABELLED WIRING DIAGRAM ATTACHED TO INSIDE BACK/ STAMPED ON INSIDE LID: 'C [WITH UP ARROW INSIDE]'/ STENCILLED ON OUTSIDE OF LID: 'SEC. Y1/ YA 0618/ F[?]ERPHONES/ MK. IV'

Missing

CARRYING STRAP

Finish

BOX: STAINED & VARNISHED INSIDE; KHAKI GLOSS PAINT ON OUTSIDE; ATTACHED PLATES: BLACK WITH SILVER PRINTING/.1 BLACK CRINKLE FINISH WITH BLACK, WHITE AND SHINY METAL KNOBS/.2 BLACK HEADBAND AND EARPHONES WITH BROWN CORDS

Decoration

N/A