French open faced astronomical pocket watch Circa 1890

Very fine gold keyless wind pocket watch
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A fine, astronomical French gentleman’s pocket watch with perpetual calendar, moon phase and chronograph, circa 1890. With original mahogany box with mother-of-pearl inlay.
An 18-carat pink gold case, screwed gold monogram, glazed movement.
Enamel dial with decorative hands, bridge movement, gold screw compensation balance.
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Diameter: 58 mm
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Weight: 169 g
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Signed: Fernier et Frères  à Besancon