Type CD 540
Common Battery Wall Telephone
FRAMEWORK, entirely of steel, black enamelled.
MICRO-TELEPHONE. RE 4001, with cord RS 6000, suspended on a hook-switch.
CONDENSER, with a capacity of two microfarads.
RINGER. 1,000 ohms resistance.
The line terminals and a protector are enclosed in the instrument.
Weight, 10.14 lbs.
Taken from the Ericsson Telephone Catalogue 1912
Last revised: October 01, 2019