Has a 3 contact key.
Part of Telephone No. 44
Telephone includes (1928 and 1956):- 1 x Cord, Inst., No. 3/20B, Brown, 36". 1 x Diaphragm, No. 4. 1 x Diaphragm, No. 12. 1 x Earpiece No. 13 .
Circuit Diagram N136. Diagram T.L. 445.