Sigma Instruments thickness gauge

Made:
1951 in Letchworth

Sigma Instruments thickness gauge, 1951 stored in a box and fitted with a inspection fitting for measuring screw thread acceptibility. Purchased from Plessey Records in 1951.

Details

Category:
Industrial Metrology
Object Number:
1982-918
Materials:
steel and glass
Measurements:
.8976 x 8.2677 in.; cm
type:
mechanical comparator
credit:
Gift of Nottingham City Museums & Galleries