Swiss miniature fob watch in the shape of a ball Circa 1900

Exquisite diamond-set watch with a corresponding brooch
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An exquisite Swiss diamond-set miniature fob watch in the shape of a ball with a corresponding brooch, circa 1900.
Gold enamel case, engine-turned and translucent cobalt blue enamelled, and engraved star and band ornaments studded with diamonds. Corresponding gold enamel brooch studded with diamonds. Enamel dial with Arabic numerals, red 12, and spade hands. Full plate movement, bezel-wound, frosted, gilt, lateral lever escapement, and compensation balance.
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Diameter: 18 mm
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Weight: 26 g
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Signed: Swiss