Audemars Piguet Royal Oak 41 Blue Dial Stainless Steel Bracelet 15500ST.OO.1220ST.01

Audemars Piguet Royal Oak 41 Blue Dial Stainless Steel Bracelet 15500ST.OO.1220ST.01 The Audemars Piguet 15500ST.OO.1220ST.01 is the undisputed “heavyweight” of the 15500 stainless steel collection. While black, grey, and silver dials are available to the general public through authorized dealers, the “Boutique Blue” dial was historically reserved for sale exclusively through Audemars Piguet’s own boutiques. The specific shade of blue used for the “Grande Tapisserie” dial is deep and reactive, shifting from a dark midnight to a vibrant royal blue depending on the lighting conditions. This reference serves as the bridge between the classic 15400 and the newer 50th Anniversary 15510 models. It is favored by many collectors for its “perfect” dial symmetry—featuring the applied “AP” logo at 12 o’clock (which was removed in the newer 15510 series) and the omission of the “Automatic” text at 6 o’clock. Powered by the Calibre 4302, it offers a significant mechanical upgrade over previous generations with its 70-hour power reserve and a larger movement architecture that fills the 41mm case more naturally, visible through the sapphire exhibition caseback. Key Features Model Name Royal Oak Selfwinding 41 Condition New Reference Number 15500ST.OO.1220ST.01 Case Material Stainless Steel Dimensions 41 mm (Diameter) | 10.4 mm (Thickness) Dial Boutique Blue “Grande Tapisserie” Movement Calibre 4302 (Manufacture Automatic) Power Reserve Approximately 70 Hours Bezel Octagonal with 8 Polished Hexagonal Screws Bracelet Integrated Stainless Steel with AP Folding Clasp Water Resistance 50 m (165 ft) The “Boutique Exclusive” Blue. Color Depth: The “01” reference code signifies the blue dial. Unlike the more common black dial, the blue is achieved through a specialized PVD process that interacts with the Tapisserie squares to create a high-contrast shadow effect. White Gold Accents: To ensure long-term luster, the indices and Royal Oak hands are crafted from 18k white gold, filled with Super-LumiNova for a bright glow. Calibre 4302 Excellence. Architecture: This was the first Royal Oak movement to be designed with modern CNC precision to perfectly fit the 41mm case. It features 257 parts and 32 jewels, beating at 4Hz. The Rotor: The 22k gold oscillating weight is skeletonized to provide an unobstructed view of the Côtes de Genève and hand-beveled bridges.