made and sold barographs, aneroid barometers, compasses, aviation instruments such as altimeters, indicators and gauges (Sestrel brand)
1875 - established by Thomas Short and James Mason as Short & Mason
by 1876 - trading at 40 Hatton Garden, London, England; from approx 1900s traded as Short & Mason Limited, Aneroid Works, Macdonald Road., London, E17 (1910-1954?) and at Hale End Rd, 28 Wood St., London, England (1953-65), both in Walthamstow.
about 1907 - partnership with the Taylor Instrument Companies. Rochester, New York, using brand name TYCOS
Merged with Taylor Instrument Companies (Europe) Ltd., Leighton-Buzzard, Beds. (1969)