Marine chronometer by Thomas Earnshaw, London c.1800. Gimballed wooden box with slide shutter, bearing the nameplate ‘John S. Buckwell, Brighton’. Silvered 3-inch dial with steel hands and subsidiary seconds. Signed ‘Thos Earnshaw INVT ET FECIT 724’. Movement of one-day duration, with a 'quick train', Earnshaw’s spring detent escapement, two-arm compensation balance, steel balance spring with terminal curves, and numbered on movement 3195.

Presented to the museum of the Worshipful Company of Clockmakers by Mrs. Stanley Burton. Clockmakers' Museum No. 1148.