Models of hygienic sanitary appliances, 1876-1895.

Selection of valves, 1889-1906.

Morris Minor, 1986.

Manufacturing radio and television valves, c 1930s.

Loewe multiple valve radio receiver, late 1920s.

Fleming's oscillation valves, c 1903.

Fleming's oscillation valve, c 1903.

'How to build a two valve set', No 3, Godfrey Philips cigarette card, 1925.

Marconi-Fleming valve radio receiver, c 1908.

Marconi-Fleming valve radio receiver, c 1908.

Marconi-Fleming valve radio receiver, c 1908.

Daimler-Knight sleeve-valve petrol engine, 1910.