The Audemars Piguet Royal Oak Perpetual Calendar (ref. 26574TI.OO.1220TI.01) brings a complex Grand Complication into the brand’s lightest full-metal case configuration to date. Crafted entirely in titanium with a matching bracelet, the 41mm case heightens wearability while retaining the Royal Oak’s hallmark presence through its brushed surfaces and integrated architecture. The blue Grande Tapisserie dial enhances legibility across the perpetual calendar indications, including the day, date, month, leap year, and moonphase.

Inside, the self-winding calibre 5134 delivers a full perpetual calendar display and moonphase complication while maintaining a slim profile. Beating at 19,800 vibrations per hour with a 40-hour power reserve, it keeps the case height at 9.5mm – exceptionally thin for a perpetual calendar on bracelet. The model is water-resistant to 20m and framed by an octagonal titanium bezel with exposed white-gold screws.

Released in 2021, this reference is notable not only for its use of Grade 5 titanium but also as the final iteration of the Royal Oak QP before the 2022 design update. Balancing one of the most revered complications in watchmaking with the ultra-modern execution of the iconic Royal Oak design, it remains a sought-after configuration for collectors.