TELEPHONE No. 392
Combined table microtelephone (with DC trembler bell) for use in CBS No's 1, 2, 3 and Magneto areas and on long lines in CB and Auto areas on extension plans.
Also used on Private Wires.
This telephone had a tray for the subscribers personal directory but as from June 1940 the tray was not fitted and instead the telephone was supplied with a Tray, Dummy, D62099 (a blank plate). This was probably a war time cost saving, as in late 1947 the tray was re-introduced.
Available only in Black.
Mark 1 - has a receiver, Inset No. 1L in the handset.
Circuit diagram N492.
Supplied to the BPO by Ericsson, their Model N8444B - Circuit Diagram N54188 dated 1938.
Circuit diagram - N492.
Diagram for the Button labels - N620.
Last revised: June 22, 2020