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Palmer's micrometer (replica)
Replica of original micrometer caliper by Jean Laurent Palmer, patented in France 7.9.1848, range 0 to 20 mm, made after 1867 by Brown & Sharpe
Lucien Sharpe sheet metal gauge
Lucien Sharpe micrometer, c. 1850, steel, plain screw-sleeve type, (without rachet feel), reading up to 30mm by 0.01mm
Micro 2000 electronic digital metric micrometer by Moore and Wright
Micro 2000 electronic digital metric micrometer by Moore and Wright range 0 to 25mm.; a model developed in 1973.
A Brown and Sharpe 0" to 1" pocket micrometer caliper made i
A Brown and Sharpe 0" to 1" pocket micrometer caliper made in 1928 which uses a micrometer and a vernier scale to enable readings to be read to 0.0001".
early metric micrometer
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.
digital readout micrometer
Micrometer caliper, direct reading, invented by J. Ciceri Smith, Edinburgh, pat.1893.