Sigma mechanical comparator

Made:
1940-1950 in Letchworth

Sigma mechanical comparator fitted with a perspex cover to reveal workings and with the original instrument cover; complete with an inspection fitting on the instrument platform; dated 1940 to 1950.

Details

Category:
Industrial Metrology
Object Number:
1973-404
Materials:
steel
Measurements:
overall: 21.063 x 10.0394 x 8.0709 in.; 53.5 x 25.5 x 20.5 cm
type:
mechanical comparator
credit:
Herbert Controls & Instruments Ltd.