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77.1500

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ID = 12117
       
Country:
Germany
Brand: Osram GmbH KG; Berlin
Tube type:  Voltage Regulator, cascade 
Identical to 77.1500

Base Edison medium E14 = 14 mm, mignon (Codex=Edison 14 mm)
Filament
Information source Taschenbuch zum Röhren-Codex 1948/49   


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