French 18K gold pocket watch with skeletonized movement Circa 1767

Gold verge with gilt metal outer case
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A very fine and rare French, 18K gold pocket watch with skeletonized movement, date and original glazed and gilt metal outer case, circa 1767. Outer: two-body, glazed back. Inner: Two-body, both sides glazed, the bezels chased with oval paterae on a matted ground and with pie-crust borders. White enamel dial with dauphine Arabic numerals, outer dot minute markers and Arabic quarter-hour numerals, outer red-painted date ring. Fine pierced gold hour and minute hands, steel serpentine date hand.
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A skeletonized movement, frosted gilt, foliate engraved backplate, three cylindrical pillars, fusee and chain, verge escapement, micrometre adjustment to the potency, gold three-arm balance with perpendicular limiting pin acting against two polished steel plates mounted at each side of the backplate, flat balance spring, polished steel endplate, index regulator. Movement signed and dated.
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Diameter: 50 mm
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Signed: Michel Fortin  Paris
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The dial is chipped.
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Michel Fortin was the son of Augustin, he worked in the Rue de la Harpe until 1772 when the business passed to his son, also named Augustin.