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ID = 71919
Brand: Philips Italy; Milano (MI)
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Double Diode-Pentode   RF/IF-Stage   Controlling (mu) 
Identical to WE37F_ABF1 = ABF1
Similar Tubes
Normally replaceable-slightly different:
Heater different:

Base Europe side contact P8A (Au P, 8SC) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.3 Ampere / Indirect / Specified voltage AC/DC

This tube corresponds to the EBF2 except the heater ratings 4 V 0.3 A, hence it should actually called as ABF2.

On one side the tube is imprinted as Philips Miniwatt WE37F.
On the back side a label of Philips Italia is attached. If one removes this label, an original- Philips imprinting “ABF1” will be visible, which was probably later rejected.
However, some specimens were subsequently additionally again stamped as ABF1, below the designation WE37F.

This tube was apparently intended as a replacement of the previous (original) WE37F, although there are remarkable differences.

Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   
WE37F_ABF1: Collection JR
Jacob Roschy

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