GEORGE JAMISON, LONDON | GOLD POCKET CHRONOMETER WITH THERMOMETERMADE 1802/3

Dial: white enamel, subsidiary thermometer dial at 12, subsidiary seconds at 6Movement: gilt, full plate, spring detent escapement, jewelled to the fusee, free-sprung blued steel helical spring, diamond endstone, cut bi-metallic balance with keystone-shaped moveable weights and timing screws, signed Geo. Jamison, Charing Cross, London Case: heavy gold case, stamped TH for Thomas Hardy, and with London Hallmark for 1802Dimensions: 58.5mm diameter