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Railways - A History in Drawings
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Marconi-Fleming valve radio receiver, c 1908.
Dynatron TP11 'Nomad' radio, c 1960.
Waltham quartz wristwatch with LCD display, c 1976.
Hamilton 'Pulsar' digital wristwatch, 1970.
Zenith quartz watch with both analogue and digital display, 1976.
Marconi-Fleming valve radio receiver, c 1908.
Original De Forest 'audion' valve, 1907.
Radio valve of Clearton valve type.
Fleming's oscillation valve, 1904.
Energy Ring, Science Museum, London, 2007.
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