Patek Philippe Annual Calendar Regulator ref.5235/50R-001 from 2021

Patek Philippe revisits the unique style of its Annual Calendar Regulator by presenting it in rose gold, paired with a two-tone dial in graphite and ebony-black with a vertical satin finish. The caliber 31-260 REG QA self-winding movement, designed specially for this model, is notable for its high-tech regulator, incorporating a Pulsomax® escapement and a Spiromax® balance spring in Silinvar® – both developed by the “Patek Philippe Advanced Research” department. Within this category, annual calendar watches stand out. Unlike perpetual calendars, which require minimal adjustments for decades, annual calendars are designed to automatically correct for months of 30 and 31 days, without the need for manual intervention. Only the transition from February to March requires a small adjustment. This feature, driven by an additional module in the movement, showcases the contemporary watchmaking ability to balance tradition and convenience. The present watch is in unpolished conditions, rarely w