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ID = 28494
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  TRIODE (Detail uncertain) 
Identical to DE2_Ediswan
First year 1923 Saga of the Vacuum Tube, Tyne Seite 373

Filament Vf 1.8 Volts / If 0.24 Ampere
Information source British Radio Valves - The Vintage Years, Thrower   

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