Types AB 1200-1220
Magneto Wall Telephones
FRAMEWORK, black enamelled steel.
MICRO-TELEPHONE. RE 4000 (Old No. 532), with cord RS 6000, suspended on a hookswitch.
GENERATOR. For type, number of magnets, and resistance through which the generator rings satisfactorily, see table below.
RINGER. For resistance see table below.
These telephones have enclosed line terminals.
Taken from the Ericsson Telephone Catalogue 1912
Last revised: September 30, 2019