This stainless steel model integrates an annual calendar complication requiring adjustment only once per year, alongside a moon phase display and 24 hour indicator. The dial layout is balanced with apertures for day and month, a date subdial, and a central sweep seconds hand. The automatic movement provides consistent energy distribution, visible through the sapphire case back. The case dimensions offer presence without bulk, while the bracelet ensures a secure and fluid fit on the wrist.

The 5726/1A is built for practical luxury. It delivers everyday usability through its calendar system while preserving the signature Nautilus identity, making it an ideal piece for collectors who value both function and familiarity.