b61-451
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Item no.: 166449727311
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b61-451 PANEL GAUGE. Humphrey Patent. Patented in 1886 by Frank Humphrey of Warren, MA, and manufactured by him through 1893. Includes a three part telescoping stem, and designed to also be used as a trammel. Complete and clean, with clear mark. From the collection of Don Rosebrook. Fine 200-400