The sextant has a grey-lacquered brass Admiralty-pattern frame and a plastic handle. The white plastic micrometer drum, clamp, and worm gear on the back of the index arm. The micrometer drum is connected by a notched wheel to an electromotor made by Moore Reed and Company, Andover, England. It is also connected by an electric wire to a second electromotor that is fixed on the back of the frame near the pivot. This motor is connected to the index arm by a notched wheel. The movement of the index arm and micrometer drum are relayed by wire, presumably for recording, to a computer, that is not present, for digital reading. Buttons in the handle operate the motors. The instrument has a swivelling light for reading the scale and the micrometer. It has four green shades and two green horizon shades. Index-glass adjustment is made by a capped capstan screw and on the horizon-glass by a capstan screw.

Attached to the sextant is a threaded telescope bracket with perpendicular adjustment made by a rising-piece and a milled knob. The telescope is 87 mm in length with an erect image and a large object lens (star finder). An extra drawtube is 69 mm long. Accompanying the instrument are two green shaded eyepieces, an oil bottle for lubrication, and an adjusting pin. There are two unidentified parts and one telescope missing.

The instrument has an inlaid silver scale from -5° -130° by 1°, measuring to 128°. Micrometer to 2 arcminutes

The sextant is contained in a rectangular fitted wooden carrying box, with an Admiralty Compass Observatory certificate of serviceability in the lid, dated 20 April 1970.

This sextant is an experimental instrument that, according to documentation accompanying the donation, was never taken into production.