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ID = 44361
Great Britain (UK)
Brand: Radions Ltd., Radion Works; Bollington
Tube type:  Triode, vacuum 
Identical to Pyramid-2
Similar Tubes
Heater different:
First year Sep.1925 The Wireless World, London (WW, 79) Company advertisement

Filament Vf 4 Volts / If 0.34 Ampere / Direct
Literature -- Collector info (Sammler)   Banneitz, TB der drahtl. Telephonie u.Telegr. 1927
The Wireless World, London (WW, 79)   Radions Advertisement 1925
Pyramid-2: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

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