Swiss gold, enamel, diamond-set watch with chain Circa 1900

Gold, enamel and diamond-set pendant watch with matching chain 
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A Swiss yellow gold, enamel and diamond-set open-faced keyless lever pendant watch with matching chain, circa 1900, nickel lever movement, 15 jewels, cut bimetallic balance.
Off-white matte dial, Arabic numerals, 14k yellow gold case, white and translucent blue enamel bezel and band over guilloché ground, the reverse with matching enamel centered by a diamond-set decoration, sapphire-set crown, with matching enamel link chain, case and movement signed and numbered.
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Diameter: 28 mm
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Signed: Haas Neveux