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ID = 25927
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Triode, vacuum 
Identical to DEL612

Filament Vf 6 Volts
Description Va=80, Z=9k, Gain=7. (Dowsett 1913-23) 
Literature - - Data from my own collection   Grundig Röhren-Taschenbuch, 1948

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