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ID = 28383
Great Britain (UK)
Brand: Metropolitan-Vickers (Metro-Vick, Cosmos); GB
Tube type:  Triode, vacuum   Universal 
Identical to A45
First year 1925 Saga of the Vacuum Tube, Tyne Seite 373
First Source (s)
1927 : History of the British Radio Valve to 1940 p.155

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4.5 Volts / If 0.65 Ampere / Direct / Battery =

Descendant of type R. Bright Emitter.

Story of Cosmos valves see here

Tube prices 2 Tube prices (visible for members only)
Information source Saga of the Vacuum Tube, Tyne   p.373
70 Years of Radiotubes and V.   p.196
A45: Ebay item September 2019
Fin Stewart

A45: Fin Stewart
Fin Stewart

A45: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

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