French silver open faced key wound pocket watch Circa 1785

Silver gentlemen’s watch 
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A French silver open faced key wound pocket watch, 1780-1790. The movement with a verge escapement. White enamel dial with Arabic hour numerals, outer minute divisions and blued spade & whip hands. A plain case with reeded bezels. Dial signed, case numbered.
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Diameter: 56 mm
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Weight: 124.5 g
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Signed: Esquisillon & Dechoudens
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Geneva watchmaker Jacques Dechoudens (1728-1801) and brothers Joseph Esquivillon (1714-1798), Jean François Esquivillon (1733-1813), and Gédéon-François Esquivillon (1717-1799) founded a workshop which produced high quality verge pocket watches.