Q3520
Wall pattern in oak case comprising solid-back transmitter, 1000ohm bell, 3 magnct generator, double-pole "Bell" receiver and induction coil .
Dimensions 11.5" x 8" x 8.5" / 292mm x 203mm x 216mm
Taken from the Siemens Brothers Catalogue 1928
Last revised: February 26, 2022
FM2