Swiss niëlloed silver and rose gold lever watch Circa 1910

Niëlloed silver and rose gold open faced dress watch by Ulysse Nardin
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A fine and unusual Swiss niëlloed silver and rose gold open faced keyless lever dress watch, circa 1910. Frosted gilt movement, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance with blued steel Breguet balance spring, swan neck micrometer regulator. Silver hinged cuvette. White enamel dial with Breguet numerals, outer minute track, subsidiary seconds and original blued steel spade hands. Case decorated entirely with niëllo in imitation of crocodile skin, the back with an inlaid offset vacant rose gold cartouche. Dial and movement signed, case signed Havila, case and movement numbered.
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Diameter: 49.5 mm
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Signed: Ulysse Nardin Locle & Genève