Swiss gold and enamel oval-shaped pocket watch Circa 1870

Oval-shaped pendant watch presumably for the South American market
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Very rare oval gold and enamel shape watch with diamonds, around 1870. Presumably from Switzerland for the South American market.
Very rare 18K gold oval case shape, enamelled on both sides (restored), set with diamonds on both sides, and a large oval diamond on the front. High-quality oval formwork movement with wolf teeth and cylinder escapement. Exceptionally beautiful enamel dial (fine hairline crack) with Roman radial hours, outer minutes track with Arabic five minutes numerals, and blued steel hands.
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Dimensions: 31 x 40 mm
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Weight: 40 g
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Signed: No name