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ID = 31203
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  CRT (cathode ray tube, picture tube)   Indication 
Identical to M28-12W

Base 7-pin miniature with base glass top CRT
Filament Vf 11 Volts / If 0.068 Ampere / Indirect / Specified voltage AC/DC

Precision rectangular monitor-tube, electrostatic focus, magnetic deflection.
Reinforced envelope, 90 degree deflection.
B7G style base with spigot.

Text in other languages (may differ)
Weight 2200 g / 77.60 oz
Information source - - Manufacturers Literature   Telefunken Taschenbuch 1971

m2812w_so.png M28-12W: rtt
Anonymous 10 Collector

Just Qvigstad
M28-12W: Manufacturer's Literature
Emilio Ciardiello

More ...
Usage in Models 1= 1970??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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