French watch with enamel painting and diamonds Circa 1780

Gold, enamel and diamond-set verge watch
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A French extravagant 18 carat gold, enamel and diamond-set verge pocket watch, circa 1780. Verge movement.
White enamel dial with repair near winding shaft, Arabic hours, outer minute divisions and pink gold hands. Engraved case, the back set with an oval polychrome enamel portrait of a lady framed by diamonds. Movement signed and numbered, matching numbers on the case and movement.
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Diameter: 41 mm
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Weight: 58 g
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Signed: Perache Paris
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Verge watches of this type are usually set with jewels that imitate diamonds. This very rare edition has real diamonds.