This replica nautilus 57261A 40.5mm packs annual calendar and moon phase complications into the Nautilus case without sacrificing the sport-watch identity. The 5726/1A reference adds day, date, and month displays alongside a moon phase indicator, all arranged symmetrically across the dial. At 40.5mm it sits half a millimeter wider than the standard 5711, accommodating the additional complication subdials while keeping the case visually consistent with the rest of the collection.

Case & Movement Specs

• Case diameter: 40.5mm
• Case material: stainless steel
• Complications: annual calendar, moon phase
• Dial: horizontal embossing with day/date/month windows
• Crystal: sapphire front and back
• Bracelet: stainless steel integrated links
• Movement: automatic with annual calendar module
• Correction: manual adjustment needed only once per year (March 1)

Annual calendar is the sweet spot between a simple date and a perpetual calendar. It automatically adjusts for months with 30 and 31 days, requiring one manual correction each year at the end of February.

Caliber Breakdown

The annual calendar module sits on top of the base automatic movement, adding the day-date-month displays through three apertures positioned in the upper half of the dial. The moon phase indicator occupies a subdial near 6 o’clock, showing the lunar cycle with a precision of one day deviation every 122 years. Patek Philippe designed this layout to maintain dial legibility despite the additional information. The horizontal embossing still runs across the full dial face, unifying the complications into the Nautilus visual language. For a similar complication set with a darker aesthetic, the 5726/1A-014 dark dial variant provides the same movement in a different visual package. Both live within the Nautilus range as the complication-focused options.

How It Compares

The 5726 occupies territory between the time-only 5711 and the grand-complication 5740. It offers meaningful mechanical sophistication without the price premium or servicing complexity of a perpetual calendar. The stainless steel construction keeps it accessible within the collection hierarchy. Moon phase accuracy of 122 years between corrections demonstrates the movement engineering behind what looks like a simple sport watch. This replica nautilus 57261A 40.5mm delivers annual calendar and moon phase on a platform designed for daily wear.