French 18K rose gold complicated coach watch Circa 1789

Rose gold coach watch by François-Louis Godon
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A heavy French 18 carat rose gold open faced coach watch with a full calendar, moon phase and ages of the moon, circa 1789. Full plate movement, chain and fusee, verge escapement, three-arm brass balance. White enamel dial with Arabic numerals, three subsidiary dials for the date, days of the week and months, an aperture at 12 o’clock reveals the phases of the moon with the moon and gold stars painted on a blue enamel disc, the moon age is displayed along the upper edge of the opening. Polished case with maker’s mark AHK, the charge mark Henri Clavel (1783-1789), the Parisian guild punch mark A for 1789-1790 and a movement protection cap. Dial and movement signed by the watchmaker.
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Diameter: 78 mm
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Weight: 318 g
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Signed: F.L. Godon Ro de Camara de S.M.C.
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François-Louis Godon became a master in 1787 and worked at Rue de Valois-St-Honoré from 1789 to 1790. He was watchmaker to the King of Spain. Godon signed his watches ‘F.L. Godon Ro de Camara de S.M.C. (Watchmaker to His Catholic Majesty the King of Spain).