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J. P. Pratt Machinist's Gage Patent 652,521

JPRI

Aluminum
Joined
Feb 3, 2012
Location
RI USA
Latest addition to my collection. Patented June 26, 1900, by John P. Pratt, Milford MA. Multi-functional scratch-gage, surface-gage, depth or shoulder gage, height-gage, and micrometer measure-gage. Mine's missing the micrometer attachment, and one screw. Who else has one, I'd love to see the micrometer.
 

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