French 18K gold open faced verge pocket watch Circa 1775

Gold pocket watch 
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A French 18 carat gold open faced verge pendant watch, circa 1775. Frosted gilt full plate movement, round pillars, fusee with chain, verge escapement, three armed brass balance, flat balance spring, pierced and engraved balance cock with polished steel coqueret, silver regulation disc.
White enamel dial with Roman numerals, outer minute track with Arabic five-minute numerals, decorative gold hands. Plain case, bezel engraved with applied decoration.
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Diameter: 41 mm
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Weight: 51 g
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Signed: No name
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Slightly chipped around winding hole. Replaced pendant.
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Reference 0013000