GEC REPLY AND CALL TELEPHONES

All the telephones below are specially designed for use with GEC Intercom Telephones where it is desired that certain offices shall be able to ring and speak both ways to a central station, but not to intercommunicate.
They have no induction coils and are made of polished walnut with all the external metal work having an oxidised finish.

K 7735
Wall pattern hand combination with black hardwood handle.  Has ring key and trembler.

Dimensions: 10.5 x 4 x 3 inches

Cost in 1916 was £0.16.0
Cost in 1935 was £1.10.0

K 7746
Wall pattern telephone without bell.  Fitted with carbon granule transmitter.

Dimensions: 7.5 x 5 x 3 inches

Cost in 1935 was £1.5.0

K 7750
Wall pattern telephone with 5 ohm trembler bell.

Dimensions: 8.5 x 6 x 5

Cost in 1916 was £0.16.0
Cost in 1935 was £1.17.6

K 7796
Table pattern telephone with buzzer wound to 5 ohms.

Dimensions: 10.5 x 6.5 x 5.5 inches

Cost in 1935 was £3.0.0

K 7952
Wall pattern battery reply call telephone, comprising "Manchester" shot transmitter, electro magnetic watch receiver, trembler bell (25 ohm) automatic switch hook, auto resetting ring key and impedance coil.

Dimensions: 10 x 7 x 5.5 inches

Cost in 1928 was £3.0.0

K 7953

SUB-STATION TELEPHONES

WITHOUT INDUCTION COIL

ELECTRO MAGNETIC AUTO-RESET TYPE

These instruments are not suitable for working in pairs.

Cabinet work of well-seasoned walnut.

This particular type of telephone is known as the “Sub-Station” telephone. The term “Reply and Call” is incorrectly applied to the ordinary battery call telephones.

The circuit and construction, as well as the operation, are similar to the inter-communication telephones K7867 & K 7888, except that they are without a radial selector, and without any means of inter-communication between sub-stations. The central station instrument can be any of the telephones K 7867, K 7888, K7907 & K 7913.

This system has been designed to enable a manager or other official to obtain telephonic communication with certain members of his staff both ways, while the staff can have no communication with each other.

It is necessary to have six wires running between the central station instrument and every sub-station, i.e., 4 common battery wires (2 for the talking battery and 2 for the ringing battery), one common call wire, and a separate reply wire from each instrument.

Instruments fitted with induction coil and arranged for ordinary local or central battery circuits can be obtained for extension to existing installations at an extra charge.

Wall telephones, comprising K 7670 carbon granule transmitter, K 7631 “Watch” pattern electro-magnet receiver, auto-reset ringing key, automatic switchook, impedance coil and 25 ohm bell on tail piece.  External metal parts oxidised copper bronze.

Weight 3 lbs. 8 oz.

Dimensions 10 x 7 x 5 ins

Cost in 1935 was £3.0.0

K 7962
Similar to above but with handset.

Dimensions: 12 x 7 x 4 inches

Cost in 1928 was £4.0.0

K 7966
Table model of above but with automatic cradle switch, flexible cord and wall rosette.

Dimensions: 10 x 5 x 7.5 inches

Cost in 1928 was £4.18.0

K 7967
See K 7953 for more details

Table telephone, comprising automatic cradle switch, auto-reset ringing key, impedance coil, 25 ohm buzzer, latest pattern brown Bakelite handset without speaking key in handle, fitted with a superior quality receiver and improved type inset transmitter, which can be easily removed, flexible cord and wall rosette. External metal parts coin bronze.

Weight, 4 lbs.

Dimensions, 9 x 8 x 4.5 ins.

Cost in 1935 was £4.18.0

Last revised: March 17, 2006