Radio Valve R5V, by Marconi Osram Valve Co., London, c. 1923

Subject: Radio communication; Radio communication; Radio communication; Radio communication
Item type: Object
Makers: Osram
Provenance: Not ascertained.
Primary inscriptions: Signed: "Osram" and BBC stamp.
Physical material: Glass and nickel
Object type: Radio valve
Inventory No: 27050

Description

Dull emitter, pipped, R5V by Osram for Marconi, with nickel base. Fitted into the V2A Marconiphone receiver.