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ID = 13904
Brand: Métal; France (tubes)
Developer: Métal; France (tubes) 
Tube type:  TRIODE (Detail uncertain)   Audio Frequency 
Identical to CL504
Similar Tubes
Normally replaceable-slightly different:

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Dimensions (WHD)
incl. pins / tip
x 116 x 55 mm / x 4.57 x 2.17 inch
Weight 62 g / 2.19 oz
Information source L'ABCDaire des lampes de TSF des jeunes années   p. 22
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 95, p. 130
Taschenbuch zum Röhren-Codex 1948/49

Just Qvigstad

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