A George III Turkish market silver and tortoiseshell triple cased key wind gentleman's pocket watch, the gilt fusee movement with verge escapement, tulip pillars and pierced and engraved balance cock, the backplate signed 'Geoe Prior London 26913', the white enamel dial with black Turkish numerals and signed 'George Prior London', case diameter 4.9cm, the outer case with engraved pronounced rim, diameter 6cm, both hallmarked London 1797-98 by James Richards, the tortoiseshell mounted outer case with inlaid foliate borders, unmarked, diameter 7cm (crack to tortoiseshell and minor inlay losses). Note: for a similar example by this maker, see page 285 fig. 9.25 of 'English Clocks for the Eastern Markets' by Ian White. George Prior established himself as the leading exporter of European clocks and watches to the Ottoman Empire between 1765 and his death in 1814. His watches were so highly regarded that the Turkish word for a good pocket watch became Piryol, a corruption of his name in Turkish. Provenance: formerly the property of Tom Robinson, past chairman of the Antiquarian Horological Society and author of various horological books including 'The Longcase Clock'.