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ID = 25488
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 12YV1 = 12Y-V1
Similar Tubes
Heater different:
  12Y-V1A ; 12YV1A

Base UY-Base, 5 Pins (USA, April 1927)
Filament Vf 12 Volts / If 150 Ampere / Indirect / Specified voltage AC/DC
Description Japan. Ua= 230 V; Ug2= 100 V; Ug1=-3V; Ia= 8.2mA; Ig2= 2.2mA; S= 1,6 mA/V; or Ua= 180 V; Ug2= 75 V; Ug1=-3V; Ia= 4 mA; S= 1,2 mA/V; (Babani) 
Information source Babani, International Radio Tube Encyclopaedia   
-- Collector info (Sammler)   
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