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D.C. amplifier and electrometer

1960-1979
Crawley motor plough, Model OM3, three furrow, by Crawley Agrimotor Co., Saffron Walden, Essex, Serial No. 13040, c. 1919. Engine: Serial No. 43994, 30 hp 4-cylinder side valve petrol.

Crawley motor plough, 1919.

1914-1924
"Edspot" combined Wheatstone bridge and potentiometer, type KN15, no.4831, by WPA ( Walden Precision Apparatus Ltd.), 1965-1975

"Edspot" combined Wheatstone bridge and potentiometer

1960-1979
Hand pushed hearse, 1892, made by Hayward of Saffron Walden

Hand Pushed Hearse

1892