Among the unique features of this unique variation of the Hourstriker timepiece from Ulysse Nardin is its novel hour repeating device that allows it to strike the gong each hour. As well as the hourstriker lever, its black onyx ‘tigers’ dial features polished hands and index hour markers for hours and minutes, catchy engraved tigers art below 12 o’clock and the maker’s logo above 6 o’clock. The 42-hour-reserve UN-610movement is protected by a round rose case whose verified 30 meters water resistance ensures the watch can be safely used for snorkeling and swimming.