COMMON BATTERY TELEPHONE SET
This is a battery ringing type Telephone Set equipped with two push buttons, one to call exchange and the other for code ringing.
It is fitted with a 5,000 ohm relay and buzzer and 4016-D microtelephone.
This set is similar to the 4214-A except that it is fitted with the No. 4017-A microtelephone.
Weight - 6.25lb (2.83kg)
Dimensions - 9.25in x 8in x 6in (23.5 x 20.32 x 15.24cm)
STC Apparatus Catalogue for Telephone, Remote Control and Railway Signalling
Catalogue, Edition 5 (1952)