Rare Brown & Sharpe Button Caliper Rule, No. 398 – Grad in 40ths – mjdtoolparts

Specifications

A rare SLIDING BUTTON CALIPER RULE, No. 398, by the Brown & Sharpe Manufacturing Company, Providence, Rhode Island. This uncommon special purpose caliper is graduated in 40ths of an inch--the standard used in the measurement of buttons from the earliest time. This is the first example by a major manufacturer that we have seen or offered for sale. Length = 3.00 Inches (Ref. Id No.: 445703) [Free Shipping]

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