TELEPHONE No. 327

Bakelite cased wall telephone, introduced in 1956, for use in CB and Automatic exchange areas on extension plans.

The handset is a Telephone No. 164.

This telephone has provision for three buttons in the case moulding and a DC Trembler bell with one gong.

The case and all internal components are mounted on a plate.  This plate is fixed to the wall, by means of 4 rubber mounts, using wood screws.

The case was fixed by a single screw next to the handset cord entry.  The case had a flexible cloth type strap that fixed to the back plate allowing the case to hang during maintenance work.

This telephone has a bell that is used for internal communication.  It will not ring on external calls.

Produced in Black, Chinese Red, Ivory and Jade Green.

Telephone Includes (1955):-
1 x Bell No. 65A, Unmounted.
1 x Bell-gong No. 2.
1 x Coil, Induction No. 27.
1 x Condenser, M.C. No. 97.
1 x Cord, Instrument No. 5/28E, 5" (for Dials, Automatic only).
1 x Filter, Suppression No. 26A.
1 x Part No. 1/DCA/89 (Colour).
3 x Part No. 1/DBU/11 (Colour).
1 x Dial, Automatic S.S., No. 12LA & FA ... or Dummy No. 3 (Colour).
1 x Telephone No. 164 (Colour).

Wall equivalent of the Telephone No. 326.

Superseded by the Telephone No. 711 circa 1964.

Made by British Ericsson, Model N1081A1.

Diagram for telephone circuit - N427.

Diagram for Button labels - N620.

Drawing - 90510 (Mark 1).

Specification - S77.

History, Technical and General Information on 300 type telephones
Click for an article from the Post Office Telecommunications Journal 1955
Development of the Bakelite Wall Telephone
300 Type telephone circuit description
Collectors information
Keys for use in 300 type Wall and Table Telephones
How to restore Bakelite
How to wire your Telephone No. 327 to make it work on Plug and Socket
Comparison chart of GPO 300 type telephones

Telephone No. 327 with case removed