GEC K7825

K7825
Battery call Telephone

As K7820 but fitted on a back board.

Fitted with Hunningscone-Deckert transmitter.

This instrument is constructed of polished walnut and the finish of all external metal work is oxidised.

Cost in 1916 was £2.2.6
Cost in 1928 was £3.1.9
Cost in 1935 was £2.7.6

Later version had a carbon granule transmitter and the terminals were internal.

Wall pattern battery call telephone, comprising K 7670 carbon granule transmitter, K 7630 “Watch” pattern double-pole receiver, K 7728 induction coil, automatic switch hook, ringing key and 25 ohm bell on tail piece.

Weight, 3 lbs. 8 ozs.

Dimensions, l0 x 7 x 5 ins.

Last revised: February 28, 2006