Micro-telephone with three position contact key in handle for use
at Lloyds of London.
Telephone included (1928):-
1 x Connection, Mouthpiece No. 1.
1 x Cord, Instrument No. 502.
1 x Diaphragm No. 12.
1 x Earpiece No. 2.
1 x Mouthpiece No. 1.
1 x Transmitter No. 10.