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ID = 28961
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Triode, vacuum   Universal 
Identical to 221D = UV201A
First year 1926 Saga of the Vacuum Tube, Tyne page 295-297

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =
Description Designed for Northern Electric of Canada. 
221D: Personal Collection
Bernard Sinambela

221D: KoBi
Konrad Birkner † 12.08.2014

221D: KoBi
Konrad Birkner † 12.08.2014

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