A mid 19th century 8in.(20cm)radius sextant, by William Cary, London.
Numbered 851 on the arc and reading from -5 to 135 degrees on the platina scale. The index arm with magnifying lens and vernier to 10 seconds. Rosewood handle with ivorine note plate. Fitted with screw adjustment to the horizon mirror, three horizon and four sun shades. In a fitted keystone mahogany carrying case, with sighting tube, telescope and inverting scope.