French calendar watch in a malachite stone case Circa 1810

Silver gilt pocket watch with date
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A fine and unusual exquisite large silver gilt pocket watch in a malachite stone case with calendar, France circa 1810. Gilt brass full plate movement with square pillars, fusee with chain, verge escapement, pierced and engraved balance cock  with polished steel coqueret surrounded by a silver engraved disc, plain brass three arm brass balance, flat blued steel balance spring.
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The watch is housed in a stunning malachite stone case, adorned with a gold monogram.
Small eccentric white enamel dial with Arabic numerals, outer minute track, gilt brass dial plate chased with foliate decoration, steel Breguet hands, two small white enamel dials for date and day, silver regulation dial in the middle with steel indicator. Dial signed. The entire timepiece is in excellent condition.
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Diameter: 58 mm
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Weight 145 g
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Signed: Chappelin
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Reference 041000