A late 19th Century brass drum sextant, in cylindrical case, with silvered arc divided 0o-140o, index arm and magnifier, two shades and horizontal mirrors, signed Elliot Brothers, 56 Strand London, the cover inscribed Gent. Cadet William Innes. 1st price mathematics R.M. Acedemy Decr 1857 - 7.6 cm diam.