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ID = 42441
Great Britain (UK)
Brand: Cintel Ltd., Form. Cinema Television Ltd.; Ware.
Tube type:  Photocell Gas filled 
Identical to QVA-39

Base Wires only.
Description Bismuth-caesium phototube, sensitivity similar to that of human eye. Quartz envelope. 
Information source -- Original prospect or advert   Electronics, July 1951
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