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Sectioned Cenco-Hyvac two stage rotary oil pump

1921-1926
Gaede type rotary oil pump, by W. Edwards & Co., London, England, 1916-1926

Gaede type rotary oil pump

1916-1926
"Speedivac" high vacuum pump and compressor, model 1SC30, serial no. 928, by W. Edwards and Co. (Ldn.) Ltd., London, England, belt driven from 0.25 h.p. a.c. motor type BS2408 no. D30003T, by British Thomson-Houston Company Limited, British, 1950-1955. Mounted on a common base plate.

'Speedivac' high vacuum pump and compressor

1950-1955
Accessory kit for Edwards 'Speedivac' educational vacuum equipment, in fitted case, by Edwards,W. and Co., Crawley, West Sussex, England, 1950-1983

Accessory kit for Edwards 'Speedivac' educational vacuum equipment

1950-1983