Rare Swiss 18K rose gold glazed verge pocket watch Circa 1780

Rose gold watch with vase form movement
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A rare Swiss 18 carat rose gold key wind pocket watch, The Vase, with visible balance made for the Chinese market, circa 1780. The case is glazed on both sides, showing a decorative vase form with a white enamel dial featuring Roman hour numerals, outer minute divisions and moon hands on the face, and a polychrome enamel painting on the reverse. The gilt vase shaped movement is fitted with a verge escapement.
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Diameter: 52 mm
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Weight: 51 g
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Signed: No name
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These watches are extremely rare. To date, only about ten of these watches are known to exist, most of them in important collections and museums. In 2016, one of these ten watches was sold in Geneva for more than CHF 18.000 (about € 16,515). Another example was auctioned with an estimated price between € 15,000 and € 20,000.
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Further examples are among others in:
The Württembergisches Landesmuseum in Stuttgart, Germany;
The Musée Historique de Bâle in Basel, Switzerland (with a later dial);
The Patek Philippe Museum in Geneva, Switzerland, formerly in the Marcel van Cauwenbergh Collection, sold by Antiquorum in Hong Kong on March 30, 1989, for € 25,197;
The time Museum in Rockford, Illinois, USA, (a very similar piece) sold by Sotheby’s in New York on June 19, 2002, for USD 16.730 (about € 15,890);
The Musée d’Art et d’Histoire in Geneva, Switzerland, but it was stolen on November 24, 2002;
An important German private collection.