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ID = 28448
Brand: Métal; France (tubes)
Tube type:  Triode, vacuum   Universal 
Identical to CL172
First year 1925 ?? Saga of the Vacuum Tube, Tyne Seite 402

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Description for resistance-capacity coupled RF and AF circuits. 

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