French verge pocket watch with decentralised time Circa 1780

Pocket watch with decentralised time and retrograde date
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A French silver pocket watch with decentralised time and retrograde date, circa 1780. Gilt full plate verge movement with three arm steel balance, blue steel spiral hairspring pierced and engraved bridge cock, silver regulator disc with gilt indicator.
Original high quality silver case, full signed original enamel dial, blued steel Breguet hands, very rare retrograde date with hand, technically interesting.
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Diameter: 56 mm
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Weight: 94 g
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Signed: Bourquin Le Jeune à Paris
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Famous Parisian and Geneva watchmaker.