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ID = 44365
Great Britain (UK)
Brand: Cleartron Radio Ltd.; London
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Triode, vacuum   Universal 
  <1925 very rare. ***
Identical to CT199 = 199_UV
Similar Tubes
Other base:
  199 ; C299 ; UV199

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Vf 3 Volts / If 0.08 Ampere / Direct / Battery =

This tube is identical to the CT199 made by the parent company in the USA and is probably an import from them. The tube box is clearly marked Cleartron London and Birmingham

Information source -- Collector info (Sammler)   Banneitz, TB der drahtl. Telephonie u.Telegr. 1927
Wireless World (The), London (WW, 79)   Cleartron Advertisement: September 30 1925
CT199: RMG
Robert Gillespie

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CT199: KoBi
Konrad Birkner † 12.08.2014

CT199: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

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