Audemars Piguet Royal Oak Extra Thin Flying Tourbillon Chronograph RD#5 Titanium 26545XT.OO.1240XT.01

The Audemars Piguet Royal Oak Extra Thin Flying Tourbillon Chronograph RD#5, reference 26545XT.OO.1240XT.01, represents one of the most ambitious and technically complex timepieces ever to bear the Royal Oak name. Introduced as the fifth Research & Development breakthrough in Audemars Piguet's prestigious RD series, this 39mm titanium masterpiece combines two of the most demanding watchmaking complications — the flying tourbillon and the chronograph — within an ultra-thin case profile that defies conventional engineering logic. It is, in every sense, a watch for the true connoisseur.

The Royal Oak lineage traces back to 1972, when Gerald Genta sketched the octagonal-bezel, integrated-bracelet sports watch that would redefine luxury horology. Over five decades, the Royal Oak has evolved from an audacious design statement into a foundational pillar of the watch industry. The Extra Thin sub-family within that lineage has always prioritized architectural elegance and movement sophistication, and the RD#5 carries that philosophy to its absolute extreme, demonstrating that Audemars Piguet's Le Brassus manufacture remains at the forefront of grand complication watchmaking.

Crafted entirely in titanium — case, bezel, and integrated bracelet — reference 26545XT.OO.1240XT.01 achieves a remarkable combination of technical gravitas and physical lightness on the wrist. Titanium is prized among serious collectors not only for its feather-light comfort on a 39mm case but also for its hypoallergenic properties and exceptional resistance to daily wear. The unmistakable Royal Oak octagonal bezel, secured with eight H-shaped screws, frames the legendary blue Petite Tapisserie dial: a meticulously crafted guilloché surface whose fine pyramid-textured pattern shifts subtly with the light, producing that signature depth and dimensionality that Royal Oak dials have been celebrated for since the 1970s.

At the heart of this timepiece beats a mechanical flying tourbillon chronograph movement — a technical accomplishment that represents years of research and development by the Audemars Piguet manufacture. A flying tourbillon, distinguished by the absence of an upper bridge over the cage, offers an unobstructed view of the rotating regulating organ and is widely regarded as a more aesthetically refined execution of the tourbillon complication. Coupling this with a fully functional chronograph in an ultra-thin package requires extraordinary ingenuity in movement architecture, making the RD#5 a genuine landmark in the history of mechanical watchmaking and one of the most technically significant Royal Oak references ever released.

On the wrist, the 39mm case diameter strikes a balanced, refined presence — substantial enough to showcase the dial's complexity, yet refined enough to slip beneath a cuff with ease. The full-titanium integrated bracelet flows seamlessly from the case in classic Royal Oak fashion, sitting flush against the wrist with the organic comfort and precise articulation that Audemars Piguet's craftsmen are renowned for. This is simultaneously a watch that commands attention in a boardroom and earns respect in any serious horological conversation.

Bizak & Co. is proud to offer this brand-new Audemars Piguet Royal Oak RD#5, reference 26545XT.OO.1240XT.01, to discerning collectors and enthusiasts who demand the very best. As a trusted luxury watch dealer, we invite you to contact us directly at bizakandco.com to discuss availability, pricing, and our white-glove purchase experience. Whether you are buying your first grand complication or adding a cornerstone piece to an established collection, the Royal Oak RD#5 is among the most rewarding acquisitions in modern horology.