English extremely rare watch for the Indian market Circa 1790

Gold, enamel and garnet stone set verge watch
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An extremely rare English gold, enamel and garnet stone set pair cased verge pocket watch made for the Indian market, circa 1790.
The case can be opened on both sides through two integrated opening buttons, a polychrome enamel portrait of a lady on the back and the bezel is set with garnet stones on both sides, signed peripheral. The original white enamel dial with Roman hour numerals, outer minute divisions and gold spade hands.
The signed and numbered movement with a verge escapement.
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Diameter: 56 mm
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Weight: 140 g
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Signed: Fontac London