12-inch Radius Mahogany Octant by Spencer Barrett & Co.

17-inch Radius Mahogany Octant by George Adams, Fleet Street, London, with bone scale calibrated 0-90, index arm with brass read-out, locking thumb screw and bone Read more…

17-inch Radius Mahogany Octant by J. Gilbert, London, with boxwood scale divided 0-90 , sliding index arm with brass read-out, clamp and bone vernier (chipped) Read more…

11-inch Radius Mahogany Octant by W.F. Cannon, London, with bone scale divided 0-100º , brass index arm with bone vernier, tangent-screw and clamp, pinhole sight, Read more…

Mahogany 17-inch Radius Vernier Octant by Nairne & Blunt, London, with boxwood scale divided 0-95 , index arm with bone vernier 0-20 and brass carrier Read more…

10-inch Radius Ebony Octant by Spencer Browning & Company, London, with brass sliding index arm, bone scale divided 0-105, vernier scale indexed 0-20, thumb screw Read more…

Ten Inch Radius Ebony Octant by H. Hughes, London, the brass index arm with thumbscrew vernier adjustment, inset ivory scale calibrated 0-105 and vacant maker's Read more…

Ebony 13-inch Radius Vernier Octant by Spencer, Browning & Rust, with bone scale marked 0-95 and engraved with monogram SBR , oxidized brass index arm Read more…

16-inch Radius Mahogany Octant, unknown maker, with bone scale divided 0-90, brass index arm and bone vernier scale divided 0-10, brass thumbscrew lock, brass sighting Read more…

10-Inch Radius Ebonized Octant by P. A. Feathers, Dundee, Scotland, brass arm with vernier, thumbscrew lock and adjustment, bone scale and maker's plate signed P.A. Read more…

10-inch Radius Ebony Octant by Spencer & Company, London, with bone maker's plaque marked Spencer & Co. London , scale calibrated 0-105, brass index arm Read more…