Nautilus 5726A-001 packs annual calendar, moon phase, and day-date-month displays into a 40.5mm steel case, making this Patek Nautilus 5726A replica one of the most function-dense references in the collection. Patek Philippe designed the annual calendar complication to track months of 30 and 31 days automatically, requiring manual correction only once per year on March 1. Day and month share two windows under 12, the date has its own window at 6, and the moon phase with a 24-hour ring sits just above it. The half-millimeter size increase over the standard 40mm Nautilus accommodates the additional display elements without crowding. The clone reproduces all of these displays; the calendar is set with the correctors, and we can send a function video before you order. The calendar module also adds height, and our guide explains why case height matters on a Nautilus replica.

Specifications

• Model: Nautilus Annual Calendar
• Reference: 5726A-001
• Case size: 40.5 mm
• Case: stainless steel
• Dial: charcoal to black gradient with horizontal embossing; day and month windows under 12, date window at 6, moon phase with 24-hour ring
• Bezel: smooth steel rounded octagon
• Functions: hours, minutes, sweep seconds, annual calendar display (day, date, month), moon phase, 24-hour indication; set by correctors
• Movement: clone Cal. 26-330 S QA LU 24H, automatic
• Power reserve: 43 hours (genuine Cal. 26-330 S QA LU 24H: 45 hours)
• Crystal: sapphire with anti-reflective coating
• Strap: black croc-embossed leather (genuine: black alligator)
• Water resistance: 30 m (rain and hand-washing, not for swimming)

The annual calendar windows use dark text on white discs, which keeps them legible against the charcoal dial. Unlike a perpetual calendar, which never needs correction until 2100, the annual calendar offers a practical middle ground: fewer complications mechanically but still only one adjustment per year.

Windows Versus Subdials: The 5726 Against the 5712

The 5726A sits between the time-only 5711 and the perpetual calendar 5740 in the Nautilus hierarchy. Collectors favor it because the day-date-month display adds genuine daily utility without the thickness penalty of a full perpetual calendar movement. Patek Philippe uses aperture windows rather than pointer-style subdials, which gives the 5726 a cleaner face than the 5712 despite offering more information. The 5712R-001 moon phase in rose gold tone takes a different approach, using subdial pointers instead of windows. Explore the full Nautilus range to compare how each reference handles complications differently.

Charcoal and Black Leather for a Quieter 5726

Against the blue-dial 5726/1A on its steel bracelet, the 001 version on black leather reads more restrained and works across a wider range of settings. The 40.5mm diameter adds wrist presence without crossing into oversized territory; it is the same width as the 5980 chronograph, which also measures 40.5mm. For a buyer who wants more than time-and-date but finds perpetual calendars excessive, this Patek Nautilus 5726A replica hits the practical sweet spot in the Nautilus catalog.

Other versions of this model in stock: Patek Philippe Nautilus 5726/1A-014 blue dial, Patek Philippe Nautilus 5726/1A-014, Patek Philippe Nautilus 5726/1A, Patek Philippe Nautilus 5726/1A black dial.