The Ulysse Nardin Acqua Perpetual watch

The Ulysse Nardin Acqua Perpetual watch employs horlogical inventiveness to bridge the gap between the seemingly opposed categories of the rugged sports watch, and the complicated watch.  Through the application of innovative mechanical technology, the traditionally fragile perpetual calendar complication has been transformed into something simple to use, and nearly foolproof in operation, resulting in the world's first perpetual calendar dive watch.

The heart of this fascinating watch is the unique selfwinding UN-33 Caliber, whose innovative mechanics were conceived by Dr. Ludwig Oeschlin, and first presented to the world in the revolutionary Perpetual Ludwig watch.   Indicating day of the week, date, month, and calendar year, the Ulysse Nardin Acqua Perpetual watch will automatically take into account the varying length of months, while allowing for the variances of leap years.  What makes this timepiece mechanically different from other fine perpetual calendar watches, is its unique implementation of circular elements (epicycloidal wheels, Maltese crosses, etc.) rather than the levers, cams, and springs employed in traditional perpetual calendar mechanisms, which are considerably more delicate and correspondingly difficult to service.

The Ulysse Nardin system enables the calendar to be corrected backwards as well as forwards, a characteristic utterly unique in a perpetual calendar watch.  Not only is this solution exceptionally friendly to its wearer, it prevents any setting-related damage to the mechanism, and also permits manual adjustment in the year 2100, when the Gregorian calendar omits the regularly scheduled leap year.

The stainless  steel case of the Ulysse Nardin Acqua Perpetual watch is crafted with as much care as the movement, boasting fine finishing and meticulous detailing, particularly notable on the finely fluted unidirectional bezel; the dial too, is remarkable in this regard, demonstrating intricacy and textures which never cease to fascinate. The crown screws down, and in conjunction with the caseback which is secured with screws, guarantees water-resistance to an impressive depth of 300 meters. The polished or blued steel hands, coated with generous applications of Superluminova, ensure absolute visibility in low light, or in the depths of the ocean.  This incredible sports timepiece features technical elements found nowhere else within the world of haute horlogerie, and is an ideal representative of the unique approach to exceptional watchmaking cultivated by the house of Ulysse Nardin
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