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细节
A 19th-Century lacquered-brass half-protractor,
signed on the vernier Cary, London and engraved on the arm G.S.C. No 20, in a fitted mahogany case -- 32.7cm. (12 7/8in.) wide
See Colour Illustration
The semi-circular protractor is stamped with a double scale 0-180° and 180-360°, in parallel. The arm extends from a central glazed aperture with an engraved cross hair, to the vernier which runs along the outside of the scale, and an index arm. The base of the protractor has a parallel rule attached and two sprung blued-steel pins which can be placed in position by two brass slides to keep the protractor in place. The case is missing its two brass hooks and is inscribed in pencil on the inside of the lid No. 20 and on the outside in ink G.S.C. No 20.
signed on the vernier Cary, London and engraved on the arm G.S.C. No 20, in a fitted mahogany case -- 32.7cm. (12 7/8in.) wide
See Colour Illustration
The semi-circular protractor is stamped with a double scale 0-180° and 180-360°, in parallel. The arm extends from a central glazed aperture with an engraved cross hair, to the vernier which runs along the outside of the scale, and an index arm. The base of the protractor has a parallel rule attached and two sprung blued-steel pins which can be placed in position by two brass slides to keep the protractor in place. The case is missing its two brass hooks and is inscribed in pencil on the inside of the lid No. 20 and on the outside in ink G.S.C. No 20.
注意事项
No VAT will be charged on the hammer price, but VAT at 17.5% will be added to the buyer's premium which is invoiced on a VAT inclusive basis