The sextant has a grey-lacquered alloy three-circle pattern frame with a plastic handle containing a battery for the scale illumination lamp. The white plastic micrometer drum, pressure clamp and a worm screw are positioned on the back of the index arm. The instrument has four shades, three green and one grey, and three horizon shades, two green and one grey. Index-glass adjustment is made by a screw and on the horizon glass by capstan screws.

Attached to the instrument is a threaded telescope bracket that is non-adjustable. The telescope is 76 mm in length with an erect image. Accompanying the sextant is an adjusting pin, a green shaded eyepiece, and a dry battery.

The instrument has an aluminium scale from -5° to 125° by 1°, measuring to 121°. Micrometer to 0.2 arcseconds.

The sextant is contained in a square fitted wooden box, with a Kelvin Hughes certificate of examination, dated 1966.