Handset without
a battery switch in the handle,
used on house telephone systems.
Telephone includes (1928):-
1 x Cord, Instrument No. 413.
1 x Diaphragm No. 18.
1 x Earpiece No. 8.
1 x Ring, Receiver, Adjusting N.T. No. 1.
Telephone includes (1956):-
1 x Cord, Instrument No. 4/13A, Brown 48".
1 x Diaphragm No. 18.
1 x Earpiece No. 9.
1 x Ring, Receiver, Adjusting N.T. No.1.
Circuit Diagram - TL 232. Circuit Diagram - N132. |