Type AB 135
Magneto Wall Telephone
FRAMEWORK, polished walnut.
MICRO-TELEPHONE. RE 1050 (Old No. 52 9), with cord RS 6500 (Old No. 2601), resting on a cradle switch.
GENERATOR. RH 3150, 3-magnet, which rings satisfactorily through a line resistance of 20,000 ohms.
RINGER, 300 ohms resistance, with 2.5 inch gongs.
A protector of the disc type, and a clip for holding papers on the desk are fitted on this instrument. The line terminals are enclosed.
Weight, 14.3 lbs.
Taken from the Ericsson Telephone Catalogue 1912
Last revised: September 29, 2019