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ID = 27565
Brand: Common type Europe tube/semicond.
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Mag. Stripe, exclamation mark   Indication 
Identical to 1M1 = DM71

Base Subminiatur-8, with space 1/8, B8D
Filament Vf 1.4 Volts / If 0.025 Ampere / Direct / Battery =
Description Mazda branded.
Target Volts 90
Target Current 0.25mA
Grid Voltage change for full indication = 13.5

Target Volts 60
Target Current 0.12 mA
Grid Voltage change for full indication = 8.0 
Information source Röhren-Taschen-Tabelle, (Franzis RTT)   

1m1_sockelbild.png 1M1: Mullard - original papers
Michael Poll

Just Qvigstad
1M1: Original data sheet
Michael Poll

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