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Category
Object type
Material
Maker
Place
Date
Thermionic valve - multiple electrical valve 4 volt

Thermionic valve - multiple electrical valve 4 volt

thermionic valves

thermionic valves

Mullard valve

Mullard valve

1932
Ferranti valve

Ferranti valve

1928
Thermionic valve - valve, multiple

Thermionic valve - valve, multiple

1927
Thermionic valve

Thermionic valve

1932
G.C.E. Valve

G.C.E. Valve

1955
Marconi triode valve

Marconi triode valve

1935
Thermionic valve - valve,multiple, made by Loewe Radio Co in Germany, 1927

Thermionic valve - valve

1927
thermionic valve - valve,multiple made by Loewe Radio Co, in Germany, 1927

thermionic valve - valve

1927