Micro telephone, insulated capsule transmitter, high resistance, waterproof.Finger dial.
Ringer, 300 ohms resistance.
Press button for calling.
Case entirely of black enamelled steel.
The line terminals are enclosed.
TELEPHONE - WALL
for automatic telephone systems, battery ringing
DB 50
Micro telephone, insulated capsule transmitter, high resistance, waterproof.
Finger dial.
Ringer, 300 ohms resistance.
Press button for calling.
Case entirely of black enamelled steel.
The line terminals are enclosed.
Height of Backboard: 220 mm.
Width of Backboard: 156 mm.
Weight: 2.6 kg.
Taken from the L. M. Ericsson Telephone Catalogue No. 1921
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