"Dial-Phones for half-automatic PBX"
(The large picture changes on "mouse over" the number of the phone or the circuit diagram).
System overview:
Schema
Principle
1932 Catalog number:
7801
Circuit number:
AS-300a
1935 Catalog number:
7801s
9251s
Circuit number:
FN-3/40B
FN-3/89B