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ID = 81443
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Triode, vacuum   Audio Frequency 
Identical to R_UV
Similar Tubes
Other base and data slightly different:

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.6 Ampere / Direct / Battery =

This R tube is unique as it has 100% silvered gettering. The UV base is nickel plated. 

Dimensions (WHD)
incl. pins / tip
x x 55 mm / x x 2.17 inch
Information source -- Collector info (Sammler)   
R_UV: Fin Stewart collection
Fin Stewart

R_UV: Fin Stewart
Fin Stewart


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