Ulysse Nardin Marine Chronometer Annual Calendar Steel — Blue Dial | Ref. 1133-210-3/E3

The annual calendar represents one of watchmaking's most practically compelling complications — a mechanism that distinguishes between the months of 30 and 31 days automatically, requiring only a single manual correction each year at the end of February. In the Marine Chronometer Annual Calendar, Ulysse Nardin has integrated this complication with the UN-113 calibre's self-winding architecture to produce a 43mm instrument whose blue dial presents both the date and the full calendar function with the legibility that the Marine collection has always demanded. The 13mm case thickness is a direct consequence of the calibre's layered complication architecture; no genuine annual calendar movement in a 43mm case produces a slimmer profile without architectural compromise.

Caliber UN-113 delivers approximately 60 hours of power reserve from its self-winding rotor, ensuring that a watch removed from the wrist on Friday evening will still be running on Monday morning with the calendar displays advancing correctly. The rubber strap is an intentional specification choice rather than a practical concession: its material properties — resistance to UV degradation, salt water, and the mechanical stress of active wear — make it the natural companion to a 100-metre water-resistant Marine Chronometer designed for use rather than admiration. The backward/forward calendar-setting function, integrated into the crown protocol, allows rapid correction without the need for specialist tools or the risk of mechanical damage from incorrect manipulation.

The blue dial engages the Marine collection's established chromatic identity with authority — deep, saturated, its applied steel indices and hands maintaining maximum contrast for legibility across all ambient light conditions. The stainless steel case, finished with the alternating polished and brushed surfaces that define professional sports-watch case preparation, provides the practical durability appropriate to a watch rated to 100 metres. At $11,615 for an annual calendar in this specification, the Marine Chronometer represents a genuinely exceptional value proposition within the landscape of manufacture-produced calendar complications — a point the informed collector will recognise immediately.