SIEMENS BROTHERS No. 83 & 91
This Siemens Brothers 83/91 set is based on the standard pyramid style with a
Bellset added underneath. The phone is similar to the BPO Telephone
No. 162, the differences being; the BPO 162
is that the diagram label is mounted on the transformer coil and it has no
The Bellset is also different to GPO Bakelite Bellsets as it has a hole in the side of the cover. This allows for internal connection, whereas the GPO variant had a small cable joining the phone to the Bellset externally. There is also no drawer under the Bellset and the feet are attached directly.
The difference between the two phones pictured below is that the they have different bell ringers and the terminal/hook switch support is alloy on one and Bakelite on the other. This may be the difference between a No. 83 and a No. 91 - but requires confirmation.
Telephone No. 91 component parts
Last revised: January 14, 2022