Audemars Piguet Royal Oak Bracelet, Ref. 15510ST.OO.1320ST.06 - Blue Dial

The Audemars Piguet Royal Oak Selfwinding Chronograph reference 26240OR-OO-1320OR-05 represents a pinnacle of contemporary horology. This 2025 release, presented in immaculate condition as a Brand New timepiece, is crafted from exquisite 18 ct Pink Gold, making it a highly sought-after investment piece for discerning collectors and enthusiasts.

This particular reference integrates the esteemed Royal Oak design language with a sophisticated chronograph complication. Measuring 41mm in diameter, its iconic octagonal case, secured by eight hexagonal screws, frames a dial featuring the signature "Grande Tapisserie" pattern. The integrated bracelet, also in 18 ct Pink Gold, exhibits the characteristic alternating brushed and polished finishes, a hallmark of the brand's meticulous craftsmanship.

At the heart of this Royal Oak lies the in-house Calibre 4401, a selfwinding integrated chronograph movement. This advanced mechanism distinguishes itself with a column wheel and a flyback function, allowing for instantaneous reset and restart of the chronograph complication without stopping it first. Key technical specifications include:

• Movement: Audemars Piguet Calibre 4401, Selfwinding, Integrated Chronograph
• Power Reserve: Approximately 70 hours
• Frequency: 28,800 vibrations per hour (4 Hz)
• Complications: Chronograph with flyback, hours, minutes, small seconds, date
• Case Material: 18 ct Pink Gold
• Bracelet Material: 18 ct Pink Gold
• Case Size: 41mm diameter
• Water Resistance: 50 meters

The Calibre 4401 is visible through the glare-proofed sapphire crystal case back, revealing its exquisite haute horlogerie finishing, which includes Côtes de Genève, circular graining, and chamfering on the bridges and mainplate. Its technical and aesthetic prowess underscores Audemars Piguet's commitment to mechanical excellence and transparency.

Historically, the Royal Oak line, conceived in 1972 by Gérald Genta, revolutionized the luxury sports watch market. The introduction of in-house chronograph movements like the Calibre 4401 across the 26240 references, initially rolled out during the Royal Oak's 50th anniversary period, signifies a major technical evolution. This 2025 Royal Oak Selfwinding Chronograph in 18 ct Pink Gold continues this legacy, offering both a tribute to its iconic past and a testament to modern watchmaking innovation, making it a truly remarkable acquisition.