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Need Help Identifying Antique Brown & Sharpe Inside Micrometer

HMH

Plastic
Joined
Apr 9, 2022
I just recently bought a handful of old tools from an auction and found this Brown & Sharpe inside mic in the mix. Unless I'm just missing it entirely somehow I can't seem to find a model number on it. The only text on it says "Brown & Sharpe Mfg Co --- Providence RI, USA --- Pat. Jan 29 - 1907". I'd like to be able to get some info on it such as how old it is and how to adjust it.
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In the 1925 B&S catalog, p.465, it is model 250 inside micrometer caliper. Price $14 plus $1.25 for the leather case. They could be made in either inch or metric, same model number. There should be a knurled clamp screw opposite the stationary jaw.

Larry
 
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