Patek Philippe Complications 5205R-011 Annual Calendar Moon Phases

The Reference 5205R-011 pairs a warm rose gold 40 mm case with elegant design features such as a concave bezel, polished flanks, and skeletonized openworked lugs. At its heart is a striking olive green sunburst dial that fades into a black gradient rim, contrasted beautifully by faceted rose gold dauphine-style hands and applied baton-style hour markers. An arc of apertures across the upper half of the dial displays the day, date, and month, part of Patek Philippe’s patented annual calendar mechanism that requires adjustment only once per year in February. A moon phase and 24-hour display are positioned at 6 o'clock, supported by a rose gold frame beneath the date aperture and a two-tone green alligator leather strap secured with a rose gold prong buckle.

Powering the timepiece is the self-winding Caliber 26-330 S QA LU 24H, visible through a sapphire crystal case back. This automatic movement integrates the annual calendar, moon phase, 24-hour indication, and sweep seconds functions with refined precision. It consists of 339 components, including 34 jewels, and offers a power reserve between 35 and 45 hours. The movement beats at 4 Hz using a Spiromax balance spring and is equipped with a 21K central gold winding rotor and Gyromax balance, hallmarks of the Patek Philippe Seal mandate for precision and craftsmanship.