The sextant has a black-lacquered brass three-circle pattern frame and a wooden handle. The endless tangent screw and clamping screw are positioned on the back of the index arm. The instrument has four green shades and three green horizon shades. Index-glass adjustment is made by a screw and on the horizon glass by capstan screws.

Attached to the sextant is a magnifier on an 85mm swivelling arm. There is also a threaded telescope bracket with perpendicular adjustment made by a rising-piece and a milled knob. The telescope is 71 mm in length with an erect image and a wide objective lens (star finder). The sight-tube is 82 mm long with a red shaded eyepiece and an adjusting pin.

The instrument has a bronzed limb with an inlaid silver scale from -5.5° to 150° by 10 arcminutes, measuring to 130°. The sextant has a silver vernier measuring to 2 arcseconds, with zero at the right.

The sextant is contained in a square fitted wooden box, with a Hezzanith Instrument Works certificate of examination in the lid, dated 23 December 1940.