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ID = 46420
United States of America (USA)
Brand: Visitron / Neotron (tubes), G-M Scientific Instrument Co. / Laboratories, Inc.; Urbana and Chicago, IL
Tube type:  Photocell   Indication 
Identical to Visitron5

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Technology / Measurement

Made by G-M Scientific Instruments Co. for early TV- experiments.

Text in other languages (may differ)
Information source -- Collector info (Sammler)   Harry Alter's Radio Book 1927

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