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ID = 78992
Brand: Orion; Budapest
Developer: Kremenezky, Johann (Sator); Wien,(Röhrenhersteller) 
Tube type:  Triode, vacuum   Power/Output 
Identical to 4-23

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.25 Ampere / Direct / Battery =

Listed as being for audio output use.

Information source - - Manufacturers Literature   

b4_base_pins~~795.png 4-23: Fin Stewart
Fin Stewart

Just Qvigstad

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