SIEMENS BROTHERS No. 319
BATTERY CALL TELEPHONE
The calling device is a buzzer and a press button is fitted centrally on the dummy dial cover.
These telephones can be connected together to form a two-way intercom telephone system.
Four primary cells are required at each telephone and these would be located external to the telephones.
These telephones cannot be connected to an exchange line.
From the SIEMENS BROTHERS & CO. LIMITED catalogue No.500/54
The Bellset only contains a terminal strip and buzzer
Last revised: February 07, 2023