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Material
Date

Mullard T.H.4 radio valve, 1936

Electronic Components

1936

Wireless valve, 7405A

Acoustics

1940

Mullard "Wecovalve"

Electronic Components

Mullard Pentone PL38 Valve

Television

1930-1950

Mullard ORA triode

Electronic Components

Mullard D0.6 triode

Electronic Components
Possibly Mullard pentode valve VR1 36

Pentode valve

Radio Communication

c. 1930s - 1940s
Mullard photoconductive cell, Type no. 6I SV

Mullard photoconductive cell

Radio Communication

1920s
Mullard PM2 triode valve in box

Mullard triode valve

Radio Communication

c. 1920s