Optical lever type workshop comparator measuring machine

Made:
circa 1920 in Croydon

Optical lever type workshop comparator measuring machine, with extra daylight projector giving a 1000 : 1 magnification at the scale.

Details

Category:
Industrial Metrology
Object Number:
1929-439
Materials:
steel and glass
type:
workshop comparator
credit:
Gowlland, C.S.