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

Subject: Radio communication; Radio communication; Radio communication; Radio communication
Item type: Object
Provenance: Not ascertained.
Primary inscriptions: Signed: "Osram" and BBC stamp.
Physical material: Glass and nickel
Object type: Radio valve
Inventory No: 30209

Description

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