AN 8IN. RADIUS PLATINUM SCALED DOUBLE-FRAMED SEXTANT BY THOMAS JONES LONDON, CIRCA 1820

the oxidised brass T-frame numbered D125 with brass arc faintly signed Thomas Jones, 62 Charing Cross London and inscribed Platinum above '0', inset platinum scale divided to 140°, vernier with clamp and magnifier, braced index arm, adjustable threaded sighting tube mount, mirrors and seven shades, the reverse with wooded handle with mounting lug, contained within fitted keystone case with four tubes and four tube filters, test certificate dated 1913 in lid, the lid inscribed H.O. D125 and retailer plate for the Miscellaneous Disposals Syndicate Ltd, the box -- 13¾in. (35cm.) diameter