TELEPHONE No. 86
|CB Microtelephone for night operators.
Handset with press button in handle. The press button normally shorts the transmitter.
Possibly used on exchange switchboards for monitoring purposes.
This Telephone could also be supplied with a suspension loop and this was superseded by the Telephone No. 94 with loop.
Telephone includes (1928):-
Circuit diagram - N186
Drawing No. 8777
Last revised: September 20, 2019