Rare French gold double dialled repeating calendar watch Circa 1760

Gold quarter repeater with calendar and moon phases by Tavernier        
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A rare French gold double dialled quarter repeating à toc pocket watch with calendar, moon phases and manual year memento dial, circa 1760. This watch features a gilded full plate movement with verge escapement, a plain three arm steel balance, fusee and chain and dumb repeating. It has two dials: the front dial is white enamel with Roman hour numerals, an outer minute track, Arabic five minutes, an aperture for winding and diamond set hands. The back dial is gilded and decorated with linear engine turning, a central chapter ring for indication of the days of the week with a diamond set hand, an aperture for moon phases at 12 o’clock, an aperture for the year at 2, the months with its corresponding number of days at 4, a regulation index at 6, an aperture for the date at 8 and a manually set indication for the leap year cycle at 9 o’clock. Signed to the edge of the dial plate.
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The bezel on the back is chased and engraved with symbols of science, hunting and love, and the front bezel with flowers and foliage. Additionally, it has a pulse piece at 8 o’clock.
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Diameter: 48 mm
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Signed: Tavernier à Paris
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The indications on the calendar dial are all geared to the movement and advance mechanically, except for the year aperture and leap year cycle indicator, which must be manually advanced each year. The case bears a Paris discharge mark for Eloi Brichard (1756–1762) on one side of the stem, along with an early 19th century Viennese control mark. It is generally clean, with minimal rubbing to the engraving. The diamonds on the push buttons and hands are intact. The dial shows no chips or visible cracks on the enamel side, but there is some minor dirt on the metal side. The movement is not running or repeating when wound.
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Jean-Pierre Tavernier, a Parisian watchmaker from France, was born in 1714. He worked in Paris at Rue de Bussy, a parish of Saint-Sulpice and became a master in 1746. In 1754, he published tables with the equation of time (Table de différence du temps vrai au temps moyen). Tavernier was known for his expertise in crafting small portable clocks, including decorative clocks in rings and bracelets. Around 1766, he is said to have presented a marine clock to the Académie des Sciences, around the same time as Pierre Le Roy and Jean Romilly. He also served as the best man at the wedding of master clockmaker François Huet to Marie-Louise Quetin, the daughter of Joseph Quetin, a master clockmaker in Paris and Chatillon-sur-Loire.
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Jean-Pierre Tavernier passed away in 1795. His sons Louis, Etienne and Pierre Benjamin also followed in his footsteps, working as watchmakers and casemakers in Paris.