This Audemars Piguet Royal Oak features a 41 mm stainless steel case with 50-meter water resistance, paired with a striking blue dial showcasing the signature Grande Tapisserie guilloché finish and tone-on-tone subdials, complemented by a matching inner bezel and 18-carat white gold markers and hands coated with luminescent material for superior readability. The integrated stainless steel bracelet is designed for both durability and comfort, equipped with an AP folding clasp that maintains the seamless aesthetics of the Royal Oak line. Powering the watch is the ultra-thin self-winding Calibre 7138, a highly sophisticated movement composed of 423 components and 41 jewels, operating at 4 Hz with a 55-hour power reserve. It delivers a full suite of perpetual calendar complications, including week display, day, date, month, leap year indication, astronomical moon phase, as well as hours and minutes, all housed within a movement measuring just 29.6 mm in diameter and 4.1 mm thick. This model embodies the pinnacle of Audemars Piguet craftsmanship, blending advanced mechanical complexity with timeless Royal Oak design.