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Lot 89

A Charles Schmalcalder brass circular protractor, English, 1810-1826,

19 May 2015, 13:00 BST
London, Knightsbridge

£500 - £700

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A Charles Schmalcalder brass circular protractor, English, 1810-1826,

signed Schmalcalder, 82 Strand, LONDON, the cross-bar engraved with both linear and non-linear scales with sprung prickers at either end, adjusted by rack and pinion, in original fitted mahogany case, cross bar 12 1/4in (31cm) wide; circle 7 in (18cm) diameter

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