Swiss silver deck watch with niello decoration Circa 1907

Gold open faced pocket watch 
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An unique Ulysse Nardin observatory chronometer/ deck watch with niello decoration, original box, circa 1907. Chronometer documents from the Observatory Neuchatel and interesting handwritten accompanying letter. A very decorative and original niello case with pink gold hinges, dome inscribed “CHRONOMETRE” No. 11567, signed Ulysse Nardin, matching numbers on the movement, very fine Ankerchronometer movement with Guillaume chronometer balance, signed enamel dial in perfect condition, blued steel hands, well-kept, original condition, niello decoration with only small imperfection near hinge, with original box, original chronometer certificate from 1907, handed in by Paul D.Nardin, first class observatory chronometer.
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Diameter: 58 mm
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Weight: 161 g
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Signed: Ulysse Nardin Genève
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This watch is a real rarity, with this extremely rare niello case and in this complete and original condition, with all papers and box. According to our knowledge, this is the only observatory chronometer with niello case!