A double frame oxidised brass vernier sextant, signed on main frame 'Troughton & Simms, London', the inset platina divided 5° - 0° - 152°, swivel magnifier, 8in. (20.4cm.) radius index arm, index mirror with four shades, horizon mirror with three shades, sun inverting and star telescopes and other accessories in fitted mahogany carrying case -- 11½in. (30cm.) wide, with Kew Observatory 'Class A' Certificate dated August 1898