Swiss gold pendant ball watch with bezel winding Circa 1878

Gold Boule De Genève with brooch
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A Swiss 18K yellow gold pendant ball watch with bezel winding and a yellow gold brooch composed of interlinked circles, circa 1878. A polished case engraved with a monogram SS and Souvenir 1878, bezel winding, ring pendant. White enamel dial, Arabic numerals with red 12, outer minute track and blued steel spade hands. A frosted gilt movement, cylinder escapement, three-arm balance, blued steel flat balance spring, and an index regulator. Movement numbered.
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Diameter: 21 mm
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Signed: No name
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Some hairlines on the dial.