Métal wireless "R" valve, glass tube with amber glass innner mount and brass cap, G-D-E-R etched on tube, made by Compagnie des Lampes, Ivry, France,

Wireless 'R' valve, with grid spiral welded to supporting rod, No. C 10079 on glass bulb, Marconi-Osram Valve Co.,

Wireless 'R' valve, with grid spiral welded to supporting rod, No. C 10078 on glass bulb, Marconi-Osram Valve Co.

Wireless 'L.S.3 E' valve, No. 21884, Marconi-Osram Valve Co.,

Wireless 'R' valve, heavily gettered, bulb showing repair patches on opposite sides, unknown make,

Wireless 'R' valve, cylindrical pattern, probably No. 31895, Marconi-Osram Valve Co. Ltd.