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R550 old

Country:  United States of America (USA)
Manufacturer / Brand:  Gilfillan Bros.Inc.; Los Angeles (CA)
Year: 1923 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 3:
Main principle Crystal or Solid State Detector with Amplifer
Power type and voltage Storage and/or dry batteries
Power out
from Model: R550 [old] - Gilfillan Bros.Inc.; Los
Notes One dial (primary tuning control knob)
Price in first year of sale 15.00 $
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932

All listed radios etc. from Gilfillan Bros.Inc.; Los Angeles (CA)
Here you find 184 models, 111 with images and 128 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.