English cylinder watch made for the Ottoman market Circa 1790

Multi coloured gold, diamond set repeater by Daniel de St. Leu
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An English 18 carat gold and diamond set pair cased quarter repeating cylinder pocket watch with hour and quarter hour self strike made for the Ottoman market, circa 1790. Full plate movement, key winding, chain and fusee, four hammers, a cylinder escapement and three arm brass balance. White enamel dial with Ottoman numerals. The outer case made of four colour gold is pierced on the edge and decorated with foliage, the front bezel, crown and bow are set with diamonds, symbols of war in high relief on the back, the inner case with a pierced band and richly florally engraved, decorated with oval cartouches, a lever on the band to turn off the striking mechanism, a back bell. Dial signed.
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Diameter: 52 mm
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Weight: 142 g
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Signed: De St. Leu London
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Daniel de S(ain)t. Leu was active from 1753 to 1797. He originally came from Geneva.  De St. Leu worked in Geneva and London and was appointed Royal Watchmaker in 1765. He was best known for his finely enamelled and multicoloured gold watches set with diamonds and other precious stones, as well as for his repeating watches made for the Turkish and Islamic markets. He also made a magnificent clock in a silver holder for the Spanish court. Although De St. Leu only operated until about 1797, the company continued to produce watches under his name for about 15 more years.