in 1937 this combined table handset telephone (with magneto
bell) was used in both CB &
Automatic areas on
Has provision in the case for three press buttons.
Mark 1 - has a receiver, Inset No. 1L in the handset.
Mark 2 - has a receiver, Inset No. 2P in the handset.
Mark 2A - has a receiver, Inset No. 2P in the handset and
switch bracket and
plungers of an improved design.
British Ericsson provided the GPO with Telephone No's 328F,
Diagram for telephone circuit - N428.
Diagram for Button labels - N620.
Additional good quality pictures
History, Technical and General
Information on 300 type telephones
General fault finding on your phone
How to restore Bakelite
Dismantling the Handset
Dismantling your Telephone No.
How to wire your Telephone No. 328
to make it work on Plug and Socket
Keys for use in 300 type Wall and Table
Labels that fit in the sliding tray
Adjustment of Magneto bells
Comparison chart of GPO 300 type