early metric micrometer

Made:
1878 in Providence county
maker:
Brown and Sharpe Manufacturing Company
First type of one inch  size micrometer caliper made by Brown

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First type of one inch size micrometer caliper made by Brown
Science Museum Group
© The Board of Trustees of the Science Museum

First type of one inch size micrometer caliper made by Brown and Sharpe in 1878. This one reading metric sizes, 0 to 25 mm. with graduated scale to read to 0.02 mm.

Details

Category:
Industrial Metrology
Object Number:
1928-1122
Materials:
steel (metal)
Measurements:
3.5 x 1 x 11 cm
type:
calliper micrometer
credit:
Brown and Sharpe Manufacturing Company