The sextant has an anodized brass three-circle pattern frame and a wooden handle. The tangent screw and clamping screw are positioned on the back of the index arm and a protective brass cylinder covers the thread. The instrument has four shades, two red, one green, and one blue, and three horizon shades in blue, green, and red. 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 with a frosted glass shade. There is also a threaded telescope bracket in two parts, fitted for correcting collimation error. It has perpendicular adjustment made by a rising-piece and a milled knob. The telescope is 181 mm in length with an inverted image and four cross wires. A second telescope is 68 mm long with an erect image (star finder). The sight-tube is 85 mm in length with a fitted green shade, an adjusting pin, and a shaded eyepiece, which is missing.

This instrument has polished brass limb with inlaid silver scale from -5° to 156° by 10 arcminutes, measuring to 129°. The sextant has a silver vernier measuring to 1 arcminute, with zero at the right.

The sextant is contained in a square fitted wooden box, containing in the lid a Hezzanith Observatory Works certificate of examination, dated January 1920.

Pockett’s was a longstanding family-owned Greenwich pawnbroker, which in the late nineteenth and early twentieth century lent money against instruments to officers at the Royal Naval College. Pockett’s lasted as a souvenir shop into the 1980s.