Octant with 17" ebony frame and limb, brass index arm, inlaid ivory scale with diagonal divisions and ivory plate marked 'George Morris 1755', probably English, maker unknown, 1755

Octant (reflecting quadrant) for observing at sea, of ebony and brass, in a wooden box, made by Crichton of London, last used by Alexander McKay, master of the ship "Sydney" of Glasgow, sailing from Leith to Demerara in 1864

Octant with ebony frame with inlaid ivory scale, and ivory plate inscribed 'Thomas Hellyer 1774 Nairne London', made by Edward Nairne, London, 1774

Octant, incomplete, 12 inch, ebony frame and limb, brass index arm and fittings, ivory plates, Admiralty mark "E 12", in stepped oak box, possibly made by Thomas Jones of London, c. 1820

Quadrant, ebony frame and limb, black-lacquered index arm with brass stop, lacquered brass fittings, and inlaid ivory plates, signed and made by Spencer, Browning and Rust of London, c. 1800

Octant, mahogany frame and arm, inlaid ivory scale, and brass fittings, signed and made by Edward Powe, 1789

Octant, ebony frame and limb, brass index arm and fittings, ivory plates, and in oak keystone box, signed and made by David Stalker of Leith, c. 1870

Octant, ebony frame and limb, brass index arm and fittings, ivory scale and plate, in stepped oak box, initialed and made by Spencer, Browning and Rust of London, c. 1800

Octant, ebony frame and limb, brass index arm and fittings, ivory plate, in mahogany kestone box, signed and made or retailed by Thomas L. Ainsley of South Shields, c. 1850

Octant, ebony frame and limb, brass index arm and fittings, ivory plate, sold by Aaron Ross of Hull, unknown English maker, c. 1850

Octant, ebony frame and limb, brass index arm and fittings, ivory plates, signed and made by Benjamin Brown of Bristol, 1792

Octant, with brass frame, limb and index arm, wooden handle, silver scale, in fitted mahogany keystone box, made and signed by Jones of London, c. 1860

Octant, ebony frame and limb, brass index arm and fittings, ivory scales and plate, in mahogany keystone box, , sold by James Taylor and Co. of Dundee, unknown English maker, c. 1860

Seven-inch sextant in a box, by Dickie and Co., Troon

Octant, brass frame and limb, wooden handle, silver scales, in mahogany keystone box, signed and made by David Stalker of Leith, c. 1860

Octant, ebony frame and limb, brass index arm and fittings, ivory plate, no box, signed and made by John Gardner and James Laurie of Glasgow, 1792 - 1798