TELEPHONE No. 330

Introduced in 1937, this combined, Bakelite cased, table handset telephone for use by the BPO in C.B. & Automatic exchange areas on PBX extensions, systems that require recall facilities and certain extension plans.

This telephone had a tray for the subscribers personal directory but as from June 1940 the tray was not fitted and instead the telephone was supplied with a Tray, Dummy, D62099 (a blank plate). This was probably a war time cost saving, as in late 1947 the tray was re-introduced.

It is designed with an ASTIC circuit and comes with a tray, for the subscribers personal directory.

The press button label would have been ordered separately (Label No. 252 Black).

Supplied with one press button.

Mark 1 - has a Receiver, Inset No. 1L in the handset and switch bracket with plungers of the early type.
Mark 1A - has a Receiver, Inset No. 1L in the handset and switch bracket with plungers of an improved type.
Mark 2 - has a Receiver, Inset No. 2P in the handset and switch bracket with plungers of the early type.
Mark 2A - has a Receiver, Inset No. 2P in the handset and switch bracket with plungers of an improved design.

Suffix identification:-
Telephone No. 330CB - No dial - blank plate fitted.
Telephone No. 330L - Figured and lettered dial installed.
Telephone No. 330F - Figure only dial installed.

Telephone Includes (1946):-
1 x Bell No. 59A, Unmounted.
1 x Bell-gongs Nos. 2.
1 x Bell-gongs No. 2A Nickeled.
1 x Block, Terminal No. 20/4, (Colour).
1 x Coil, Induction, No. 27.
1 x Condenser, M.C. No. 97.
1 x Cords, Instrument No. 4/57B, (Colour), 54".
1 x Cords, Instrument No. 5/28E, 5" (for Dials, Auto., only).
1 x Dial, Automatic S.S., No. 10 ... or Dummy, No. 3 (Colour).
1 x Key No. 302A.
1 x Part No. 2/SCA/17 (Colour).
1 x Telephone No. 164 (Colour).
1 x Tray, D 62076 (Colour) or D 1/62S33 (Colour) or 1 x Tray-dummy, D 62099, Black.

Uses as follows:-

Model	System	Dial	Colour
Telephone No. 330B	Brighton	BA	Black, Chinese Red; Ivory; Jade Green
Telephone No. 330CB	CB manual	Dummy, No. 3	Black, Chinese Red; Ivory; Jade Green
Telephone No. 330F	Non-director	FA	Black, Chinese Red; Ivory; Jade Green
Telephone No. 330L	Director	LA	Black, Chinese Red; Ivory; Jade Green
Telephone No. 330S	Siemens, Southampton	FS	Black, Chinese Red; Ivory; Jade Green

British Ericsson made some of these instruments for the BPO.
Click here to go to the Ericsson CB model No. N1366.
Click here to go to the Ericsson Automatic model No. N1003.

Diagram for telephone circuit - N430.

Diagram for Button labels - N620.

Drawing No. 63022 - Telephone components parts.
Drawing No. 63023 - Chassis components.
Drawing No. 63250 - Chassis components (improved switch hook buttons).
Drawing No. 90319 - Telephone parts (Mk 3A).
Drawing No. 90373 - Chassis components (improved switch hook buttons).
Drawing No. SBA12 - 300 type base plate.
Drawing No. SCA17 - 300 type complete case.
Drwaing No. SCA20 - 300 type case.
Drawing No. SCA47 - 300 type complete case (improved switch hook buttons).