A rare 18ct. gold double dialled world time keyless lever pocket watch with calendar and phases of the moon, Swiss, circa 1910, white enamel meantime dial with Roman numerals, subsidiary day and date dials, combined month and subsidiary seconds dial, moonphase aperture, reverse white enamel dial with seven subsidiary world time dials showing the time for Washington, Chicago, New York, Paris, San Francisco, St. Petersburg and Calcutta, plain band and bezels, diameter 55mm.