Swiss gold and enamel open faced pocket watch Circa 1780

A Swiss gold and enamel key wind open faced pocket watch, circa 1780. Gilt full plate fusee verge movement, pierced balance bridge, 3 armed balance, silver regulation. White enamel dial, black Arabic numerals, black outer minute divisions, winding aperture at 2 and gilt spade hands. Consular case with enamel and seed pearl foliate decoration to reverse, stud set bezel. Movement signed.
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Diameter: 39 mm
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Signed: Delisle & Frères Moricand