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E.S.75 wireless valve, 1883-1930

1883-1930

Mazda 1R5 heptode valve, 1933-1966

1933-1966

Light fitting made by the Edison Swan Electric Co. Ltd

Light bulb made by Edison Swan Electric Co. Ltd

circa 1950

Ediswan AT.50 triode valve, McVitie Weston valve collection, 1906-1957

1906-1957
"Bercostat" variable resistance, 1 kilohm 50 watt, type L50/CF, made by The British Electrical Resistance Co. Ltd., Middlesex and supplied by Griffin and George Ltd., 1965-1975

"Bercostat" variable resistance

1960-1979
"Bercostat" variable resistance, 100 ohm 50 watt, type L50/CF, made by The British Electrical Resistance Co. Ltd., Middlesex and supplied by Griffin and George Ltd., 1965-1975

"Bercostat" variable resistance

1960-1979
Mennel exercise apparatus by Spencer Heath and George Ltd., Ponders End, Middx., used in physiotherapy department at Prince of Wales Hospital, Tottenham, c.1944

Mennel exercise apparatus by Spencer Heath and George Ltd.

1944