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Demonstration model of Babbage's Difference Engine No. 1, 19th century.
Computing & Data Processing
Pair of artificial legs for a child affected by the drug thalidomide, England, 1968 -1972
Experimental television receiver used by JL Baird in demonstration at Royal Institution, 1926
Mazradia E4M triode valve (McVitie Weston valve collection), 1910-1960