Wireless telegraph receiver, mark III tuner, fitted with Litz wound coupling coil, two stud-top switches, etc

Wireless receiving valve, R type, marked B, made by Moorhead Laboratories of San Francisco, early 20th century

Wireless receiving valve, R type, made by Marconi-Osram Valve Co., 1919 - 1929

Marconiphone wireless receiver, type V2, wavelengths 245 - 530, with two valves,

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.

Burndept Screened Four wireless set, No. C 34343, in a mahogany case, an example of the first Burndept wireless set to incorporate the screened grid valve

Crystal wireless receiver, type C form A made by the British Thomson-Houston Co. of Coventry, with variometer tuning, two switchable crystal detectors, a condenser, and in a polished wood box

Crystal wireless receiving set made in Great Britain, with the brand name Midge and Post Office approval number 902

Crystal wireless receiver made by Perophone Ltd of London

Six valve table top wireless set in a polished wooden cabinet, made by Philips

Large free-standing wireless by Murphy Radio Ltd of Welwyn Garden City in the late 1930s