The octant has an ebony frame and limb with a brass index arm, fittings, and a brass stop for the index arm. It also has inlaid ivory plates on the crossbar and the back of the frame, both of which are missing. The tangent screw, with its knob missing, is positioned on the front of the index arm and the clamping screw is on the back. The socket shades, and the glass from both of the index and horizon glasses are missing. The sight vane and back sight vanes are also missing. Index-glass adjustment is made by a screw and on both horizon glasses by levers, wing nuts, and clamping screws, which are both missing. An ivory-capped pencil is fitted in the crossbar. The octant has no box.

The instrument has an inlaid ivory scale from -2° to 98° by 20 arcminutes, measuring to 91°. The octant has a broken ivory vernier measuring in 1 arcminute, with zero at the right.

Edward Pritchard was an apprentice of Jesse Ramsden, the instrument maker.