Charming Swiss silver nonagonal shaped watch Circa 1890

Silver open faced cylinder lady’s watch
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A Swiss silver and translucent enamel nonagonal shaped keyless pendant watch, circa 1890. An open faced pendant watch with a bezel whose interior is square with inset corners. The caseback is engraved with a floral décor, a silver bow is lacking, bezel has with engraved motif. A white enamel square dial with radial Roman yellow gold numerals and paillonné décor, round in shape but looks square from the design of the bezel and gilded metal spade hands. A gilt brass,  ½ movement, going barrel, cylinder escapement, monometallic balance and blued steel flat hairspring, polished steel index regulator.
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Diameter: 34 mm
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Weight: 30 g
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Signed:  No name