Lot 125 , An early George III brass flat frame sextant, No 92 by Joseph Jackson, London, c.1760, fitted mahogany box probably 19th century, 7.75i

A Georgian brass flat frame sextant, No 92 by Joseph Jackson, London, c.1760, with index mirror, horizon glass with level adjustment, 2 pivoted shades, double pinhole sight, engraved silvered scale to the arc signed ' Jo. Jackson. N.92', 6in. radius, fitted mahogany box probably 19th century, 7.75in.
Estimate £1,500-2,500

Compare a similar sextant by Joseph Jackson c.1759 in the Science Museum, London, Inventory No.: 1981-978, which is numbered '54'.


Descriptions provided in both printed and on-line catalogue formats do not include condition reports. The absence of a condition statement does not imply that the lot is in perfect condition or completely free from wear and tear, imperfections or the effects of aging. Interested bidders are strongly encouraged to request a condition report on any lots upon which they intend to bid, prior to placing a bid. All transactions are governed by Gorringes Conditions of Sale.

Sold for £2,600