The movement has rectangular brass plates united by four tapering ‘cannon’ pillars. The wheels have four curved crossings with the exception of the escape wheel which has six straight crossings and is mounted to its collet by two screws. The deadbeat escapement has steel pallets and is not jewelled. The cannon pinion carries a six pointed ivory/bone contact wheel; the cocked hour wheel is mounted to a long arbor which pivots in the backplate. The 203mm dial is typical regulator layout with outer minute circle and inner hour and seconds subsidiary dials. Within the subsidiary seconds dial there are two apertures for viewing and adjusting the electrical contacts.

The pendulum has a wood rod with cylindrical bob and is suspended from a brass block mounted on the backboard. The upper section of the case is constructed in oak and has a sliding flat topped hood with square glazed aperture with a circular mask. The exterior is coated with a red paint. The trunk has a moulded door over a hinged lower panel and moulded base. The case is marked throughout with the observatory ordnance mark in the form of a broad arrow and eight-pointed star.

The uppermost section, constructed in oak, would have been a wall mounted case and looks to have been made in the 18th century. The movement and dial date to within the first quarter of the 19th century and are not contemporary to the case. One has to consider that these were working instruments and as such, were periodically adapted and upgraded according to necessity and progression in technology.