Patek Philippe Nautilus Annual Calendar 5726/1A – Stainless Steel 2026 moon phase

The Patek Philippe Nautilus 5726/1A Annual Calendar — a versatile complicated Nautilus combining the annual calendar and moon phase with the everyday robustness of a steel sports watch.

Specifications

• Reference: 5726/1A
• Case: 40.5 mm, stainless steel
• Bezel: Octagonal porthole
• Dial: Embossed with day/month apertures, date sub-dial and moon phase
• Movement: Calibre 324 S QA LU 24H, self-winding
• Functions: Hours, minutes, sweep seconds, annual calendar, moon phase, 24-hour indication
• Power reserve: Approx. 35–45 hours
• Water resistance: 120 m
• Bracelet: Integrated stainless steel
• Condition: Collector reference