Combining an annual calendar with moon phase indication, this replica Nautilus 57261A blue adds meaningful complication to the Nautilus formula without leaving the sport-watch context. The 5726/1A-014 reference displays day, date, and month through three apertures arranged across the upper half of the blue dial, while a moon phase indicator sits at 6 o’clock. At 40.5mm in stainless steel, this is a larger Nautilus that wears with more presence than the standard 40mm time-only references. The horizontal embossing pattern continues across the dial surface between the calendar apertures, maintaining visual continuity with the rest of the Nautilus range.

Technical Overview

• Case diameter: 40.5mm
• Case material: stainless steel
• Dial: blue with horizontal embossed texture, calendar apertures, and moon phase
• Crystal: sapphire
• Bracelet: integrated stainless steel
• Movement: automatic annual calendar
• Functions: hours, minutes, seconds, day, date, month, moon phase

Annual calendars distinguish between 30-day and 31-day months automatically, requiring only one manual correction per year at the end of February. This sits between a simple date watch and a perpetual calendar in terms of mechanical complexity and practical convenience.

Inside the Movement

The annual calendar module adds a month-length recognition layer on top of the base movement. Three corrector pushers on the case flank allow independent adjustment of each calendar function without affecting the others. The moon phase at 6 o’clock uses a disc with realistic lunar surface detail visible through a semicircular aperture. Compared to the standard time-and-date Nautilus, the 5726 adds daily information that reduces the need to check a phone or separate calendar. For the ultimate Nautilus calendar experience, see the 57121R moon phase in rose gold. Both belong to the Nautilus collection and demonstrate how Patek Philippe layers complications onto a sport-watch platform.

What Sets It Apart

The 5726/1A-014 occupies the practical middle ground in the Nautilus complication spectrum. It offers more information than the time-only 5711 or 5811 but remains simpler to maintain than the 5740 perpetual calendar. Steel construction keeps it grounded as a daily-wear proposition, and the blue dial ties it visually to the Nautilus core. This replica Nautilus 57261A blue is the annual calendar Nautilus for buyers who want complication and wearability in equal measure.