Probably Swiss rare gold double retrograde pocket watch Circa 1800

Verge pocket watch probably for the Chinese market
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From a technical point of view, an extremely unusual and very rare gold verge watch with central seconds and retrograde date and weekday, probably for the Chinese market, circa 1800.
Polished 18K gold case with hallmark DFM 6118, verge escapement. Original enamel dial with a rare retrograde depiction of the date and day of the week, and with central seconds.
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Diameter: 53 mm
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Weight: 85 g
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Signed: No name
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Retrograde
An hour, minute, seconds or calendar hand moves across a scale and, at the end of its cycle, returns immediately to zero to begin again.