A 19th-Century four-slide boxwood proof rule,

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A 19th-Century four-slide boxwood proof rule,
signed EDWD ROBERTS Maker in Dove Court Old Jewry LONDON -- 18in. (45.8cm.) long; a single-slide boxwood proof rule with brass ends, unsigned -- 14in. (35.5cm.) long; a two-slide boxwood proof rule, unsigned, with brass ends -- 9½in. (24.1cm.) long; and two part Sikes hydrometer sets in mahogany cases (A Lot)

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