SIEMENS BROTHERS No. 309

No. 309A/A
As the No. 310A/A, but without bell set.  Suitable for use as extension telephone.


No. 309B/A
As the No. 309A/A, but with Dial Dummy No. 5 fitted in place of dial.

The Telephone No. 309 was also supplied complete with a Bell Magneto No. 24 and this combination was called the Telephone No. 304.

Taken from the SIEMENS BROTHERS & CO. LIMITED catalogue No.500/54
 

Last revised: October 09, 2025

FM2