.900 silver marine chronometer by Ulysse Nardin, circa 1910, serial number 111141, 50mm diameter. Porcelain dial with black Arabic numerals, subsidiary constant seconds register and a hairline at 3. .900 silver case, curvette marked U. Nardin Marine Chronometer (pocket chronometer) with various medals. Jewelled Swiss movement signed U. Nardin Locle - Geneve. Case, curvette, dial and movement all signed U. Nardin.