French gold, enamel and paste stone-set verge watch Circa 1770

Extremely rare pocket watch with matching chatelaine by Lépine
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An extremely rare French 18K gold and enamel open faced verge pocket watch studded with paste stones with matching chatelaine, circa 1770. Full plate movement, three-arm brass balance.
The case back shows a painted enamel scene at a fountain with a small boy scooping water for a young lady on a radial engine-turned cobalt blue enamelled ground framed by decorative stones and two banners, Ca Ce(st) (this is in English) at the top and D’Amitie (friendship) below, the outer rim set with stones on both sides. White enamel regulator dial with centre seconds and a rare combination of the hour, date and weekday indication. The corresponding gold and stone-set chatelaine has three ornamental enamel plaques, the bottom one showing a scene with shepherdesses, a further enamelled key and signet attached and two heart-shaped containers and a wicker basket, the length circa 210 mm. Dial and movement signed.
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Diameter: 50 mm
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Weight: 75 g
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Signed: Lépine à Paris