Marconi Instruments Limited, Manufacturer

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Maker and Role
Marconi Instruments Limited, Manufacturer
Small glass bulb with point at top. Metal inside, metal base with 4 electrical pins 'A' and 'G' punched on base. Very rare.
Processed Material/Glass
Processed Material/Metal
Signature/Marks and Type
Marconi, Made in the Osram Lamp Works Printed
Marconi Valve / Made in the Osram Lamp works / covered by various patents Printed
R100 approved by Postmaster General type / BBC Printed
Accession No
Credit Line
Marconi Instruments Limited. Valve, 1978.1679. The Museum of Transport and Technology (MOTAT).

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