The sextant consists of circular polished brass plates with a lid that when screwed on the back of the instrument serves as the handle. The index arm is moved by a milled knob on the upper plate. The instrument has two index shades in red and green, which are moved by levers. The index glass is non-adjustable and the horizon glass is moved by two screws and a milled key shipped in the upper plate.

Attached to the sextant is a single lens magnifier on a 50mm swivelling arm. The accompanying telescope and bracket are missing. It has a sliding pinhole shutter. The sextant has no box or case.

The instrument has an inlaid silver scale from -5° to 155° by 30 arcminute, measuring to 131° (the digits are read from the pivot). The sextant has a silver vernier measuring to 1 arcminute, with zero at the left.