French diamond set 18K gold and enamel watch Circa 1790

Diamond set gold and enamel pocket watch
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A French verge in a diamond set gold and enamel consular case, circa 1790. Full plate gilt fusee movement. Finely pierced and engraved bridge cock with steel coqueret, plain three arm gilt balance with blue steel spiral hairspring. Silver regulator dial with blue steel indicator. Winding through the fully restored white enamel dial with Arabic numerals and gilt hands. Unusual consular case, the bezel set with a row of diamonds. The back covered in translucent dark blue enamel over an engine turned ground. This is overlaid with a decorative diamond set gold mask.
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Diameter: 38 mm
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Signed: Musson a Paris