Swiss decorative navette shaped cylinder ring watch Circa 1820

Diamond set enamelled rose gold ring watch 
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A very fine Swiss 18 carat rose gold, enamel and half pearl set navette shaped ring watch with a visible balance wheel, circa 1820. Moulded movement, a cylinder escapement and key winding. The front with translucent cobalt blue enamel over a guilloché ground, in the upper half a small decentralized white enamel dial with Roman hours, minute divisions, Arabic quarter hour numerals and moon hands, below a visible balance wheel with four swirl shaped curved arms on a polished steel disc, the bezel is set with half pearls. Comes with the original silk lined green morocco leather presentation box and original gold winding key.
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Dimensions: 33 x 22 mm
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Weight: 19 g
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Signed: No name
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Since the 16th century, watchmakers have been fascinated by the idea of ​​fitting a watch into a ring, but only a few succeeded. This was no different in the 19th century. Anyone who tried successfully could become instantly famous, especially if their masterpiece found a prominent supporter. It was probably James Widman whose ring watch the Duke of Mantua wore, Antoine Rojard’s fame was based on Napoleon Bonaparte’s watch and even the young John Arnold was able to give an extraordinary ring watch to King George III from England, which made him known as an excellent watchmaker.