Audemars Piguet 26670ST Royal Oak Selfwinding Flying Tourbillon Extra-Thin Blue Dial 39mm

The 26510ST combines the iconic Royal Oak design with the prestige of a hand-wound tourbillon, all housed in a stainless steel 41mm case. It's a rare fusion of sporty elegance and haute horlogerie, featuring a vibrant blue sunray dial and an exposed tourbillon at 6 o’clock.

Extremely rare. Unlike many Royal Oak tourbillons crafted in gold or platinum, this steel version was produced in limited quantities, making it one of the most desirable modern Royal Oaks for collectors. The blue dial version is especially coveted for its visual punch and classic appeal.

Inside is the hand-wound Caliber 2924, a slim, high-end movement developed by AP, boasting a flying tourbillon, 70-hour power reserve, and exceptional finishing. The movement is visible through the sapphire caseback, offering an additional layer of mechanical beauty.

The 41mm case offers a bolder wrist presence than the 39mm “Jumbo,” but thanks to the integrated bracelet and slim profile, it remains comfortable and proportionate on most wrists. It’s a perfect size for those who want modern dimensions with classic lines.

Absolutely. With its limited steel production, technical complexity, and timeless design, the 26510ST is a grail-level watch for many. Its understated luxury and rarity make it a strong long-term hold for discerning collectors and enthusiasts alike.