SEXTANTS and OCTANTS
An early 19th Century ebony octant
Details
An early 19th Century ebony octant
the maker's bone/ivory label stamped Crichton & Son London Made for T.L. Ainsley South Shields, the frame with brass mounts, three shades, mirrors, double pin-hole sight, vernier with tangent screw adjustment and index arm, 9¾in. (24.8cm.) radius, in 'keystone' shaped mahogany case with trade labels
the maker's bone/ivory label stamped Crichton & Son London Made for T.L. Ainsley South Shields, the frame with brass mounts, three shades, mirrors, double pin-hole sight, vernier with tangent screw adjustment and index arm, 9¾in. (24.8cm.) radius, in 'keystone' shaped mahogany case with trade labels