Patek Philippe Complications 5905R-010 Flyback Chronograph - Annual Calendar

The Patek Philippe 5905R-010 unites two of the brand’s most cherished complications - an annual calendar and a flyback chronograph - in a 42 mm rose gold case with distinguished polished and satin-brushed surfaces. The sunburst blue dial radiates sporty elegance, enhanced by white gold applied faceted baton hour markers and faceted dauphine hands coated with luminous material for optimal clarity. Across a subtle arc on the upper half of the dial, apertures display the day, date, and month, while central chronograph seconds and a 60-minute counter illustrate the flyback function, marrying utility and refined design.

At its core is the self-winding calibre CH 28-520 QA 24H, which merges the flyback chronograph with the annual calendar complication in seamless harmony. Operating at 4 Hz and driven by a vertical clutch, the movement integrates a day/night indicator, central chronograph seconds, and a 60-minute counter, all powered by a 21K gold rotor. Comprising 402 to 456 components and 37 to 40 jewels, it provides a power reserve of approximately 45 to 55 hours. Constructed with Gyromax balance and Spiromax balance spring technology and certified by the Patek Philippe Seal, it delivers technical excellence without compromise. The transparent sapphire case back offers a window into its beautifully finished mechanism.