Swiss gold quarter repeater for the Islamic market Circa 1780

Gold watch with rose-cut diamond-set
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A fine Swiss 18K gold, enamel and diamond-set open faced quarter repeating verge pocket watch made for the Islamic market, circa 1780. Calm Harbor by Isaac Soret & Fils. A Louis XV, the rose-cut diamond-set bezel chased with swag garland decoration, a polychrome enamel scene on the back depicting two ships at anchor off the coast, the crew fishing nearby, rose-cut diamond-set thumb pieces and pendant.
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White enamel dial with radial Roman numerals interspersed with rose-cut diamonds, outer minute track and Arabic five-minute numerals, rose-cut diamond-set Louis XV hands. Hinged gilt-brass full plate movement with conical pillars, fusee with chain, verge escapement, plain brass three-arm balance, flat balance spring, continental style gilt brass balance cock, silvered regulation dial, repeating adjustment arm, repeating on a bell activated by depressing the pendant. Dial and movement signed.
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Diameter: 41 mm
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Signed: Isaac Soret & Fils Geneva
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The case is oxidized and the dial is chipped and slightly damaged.
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Isaac Soret and Vacheron & Constantin. The trade name Isaac Soret was used by Vacheron & Constantin for plain and repeating watches. It is possible that these were intended for export. The first official record of this name in the Vacheron archives is found in 1820. However, several watches from the late 18th Century including the present watch are also recorded.