A brass lattice frame vernier sextant, signed on the arc 'T Cooke & Sons, York' and numbered '3582' with seven shades, mirrors, silvered scale divided 5° - 0° - 150°, adjustable telescope retaining socket, the index arm -- 8in. (20cm.) radius, with vernier and magnifier, tangent screw adjustment and clamp, with rosewood handle, star telescope, sun inverting telescope and other accessories, in fitted keystone shaped mahogany case