The quintant has a black-lacquered aluminium diamond-pattern frame, with a wooden handle. The pressure clamp and worm screw are positioned at the bottom of the index arm with a black plastic micrometer drum with white markings. The instrument has no shades. The round index glass is non-adjustable and the round horizon glass and the prism is moved by capped capstan screws.

Attached to the quintant is a non-adjustable threaded telescope bracket. There is also a fixed telescope attached, which is 118 mm in length with an erect image. Accompanying the instrument is a yellow shaded eyepiece, an adjusting pin, a spanner, and a detached 90° prism on a bridge, which can be secured to the frame by two spring clips.

The instrument has an sluminium scale from -5° to 155° by 1°, measuring to 153°. Micrometer to 1 arcminute.

The quintant is contained in a square fitted wooden box, with a Hezzanith Instrument Works certificate of examination in the lid, dated 23 February 1954.

This quintant is a regular sounding quintant used to measure angles up to 153° but, when the prism is put in place, angles up to 180° can be measured.