A rare Whytt Thomson ship's gimballed deck chronometer, in excellent working order, 48 hour movement, dial inscribed with maker's name and 'Makers to the Admiralty, Glasgow and south Shields' with ivory plate (cracked) on box, number 5764, circa 1920s, 12 cm dial diameter. Height 17 cm. Width 18 cm. Depth 18.5 cm