Fullplate fusee movement of a typical Pennington caliper with its unusual shaped cock, finished from an 18-size Lancashire frame. Cylinder (deadbeat) escapement with original 16-tooth brass escape. Steel balance, 6145-turn spiral balance-spring. 43 mm diameter.
Robert Pennington, associated with Thomas Mudge junior in the manufacture of chronometers to his father’s pattern, who later concentrated on the manufacture of spring-detent chronometers. Succeeded by his son Robert, the Pennington family were one of the leading London manufacturers of both pocket and box chronometers in the first half of the 19th century and devised, among other improvements, the screw adjusted balance that became the standard compensation balance used worldwide. They also supplied non-chronometer pocket watches with a variety of escapements, but they are uncommon, the more so if bearing their name.
Lacking brass-edge, dial and hands (this movement was never capped), with a broken 3rd wheel pivot and very dusty. Otherwise looking to be complete with the balance swinging freely. Not working.