Marine Sextant by Cary of London

numbered 2499, in fitted mahogany box. Silvered inlaid scale, 0 -160 degrees, magnifier to vernier with opaque glass, fine screw adjustment and hard wood handle. Fitted with 7 shades and mirror, complete with siting and astral telescopes, but third scope missing. With test certificate to lid, issued by National Physical Laboratories of Teddington. Professionally restored and polished. Box size 25 cm (10").