An late 18th century 16in (41cm) radius Rosewood frame Octant.
Reading from 0 to 90 degrees on the ivory scale, the brass index arm with floral engraving fitted with an ivory vernier reading to 10 seconds. Main sighting by a twin hole pinnula with sliding cover, and secondary horizon mirror and pinnula. Two sets of three dark shades. Bearing an engraved ivory plaque on the cross arc inscribed "Capt. Hutchinson" and an ivory note plate on the reverse.