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ID = 33272
Tube type:  Vacuum Pentode 
  Late but very rare. ***
Identical to 3171a
Similar Tubes
Other base and data slightly different:

Base EU-Telephone 7-pin (G7K) Top contact with a cap.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel / series AC/DC

Hersteller vermutlich Siemens Wien, Ua=250V, Ia=10mA, Ug2=150V, Ig2=4mA, Ug1=-2V, S=3,5mA/V, Ri=750kΩ, Pamax=3W, Pg2max=0,8W

Information source
3171a: R.W.
Rico Wolf

3171a: Lorenz Empfänger-Röhren ,9. Auflage
Anonymous 54 Collector


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