TELEPHONE No. 399
Introduced in 1952, this Bakelite cased, combined handset wall telephone (equivalent to the table Telephone No. 332) was used by the BPO in C.B. and Automatic exchange areas.
Produced in the colours; Black, Chinese Red, Ivory and Jade Green.
The telephone has no additional press buttons.
The phone case is released from the back plate by one screw on the right hand side of the case. The whole body, complete with chassis, swings open to the left, away from the back-plate which is fixed to the wall via three stand offs on the base plate.
This telephone only used the Telephone No. 164 (Mk 2A) as the handset, so the telephone is also a mark 2A with no Mark 1 or 2 ever produced.
The case to backplate fixing screw is 2BA (1/DCO/32).
This phone was superseded by the Telephone No. 333.
Supplied to the BPO by British Ericsson, their model No. N1421.
Diagram for telephone circuit - N499.
Drawing - 63789.