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CALCULATORS
A fine set of 18th-Century boxwood Napier's bones,
A fine set of 18th-Century boxwood Napier's bones,
Details
A fine set of 18th-Century boxwood Napier's bones,
unsigned, with eleven calculating rods, a plain broader rod of the same wood, and a (replacement) back board, contained in a boxwood case with sliding cover and decorative geometric engraving -- 3½in. (8.9cm.) wide
See Colour Illustration
unsigned, with eleven calculating rods, a plain broader rod of the same wood, and a (replacement) back board, contained in a boxwood case with sliding cover and decorative geometric engraving -- 3½in. (8.9cm.) wide
See Colour Illustration