STC TELEPHONE No. 4312-A

No. 4312-A - TELEPHONE SET

This is a battery ringing wall telephone set fitted with two press button keys, one for code ringing and the other for calling the exchange.

The relay employed has a resistance of 5,000ohms.

Weight - 6.5lbs (2.95kg)
Dimensions - 8in. x 9in. x 5in. (20 x 21 x 13.5 cm)


Taken from:-
STC Catalogue for Railway Systems Apparatus, D/DT. 17D1, Edition 1 (1957)

Last revised: May 11, 2025