Audemars Piguet Royal Oak Chronograph 26240ST Blue Dial
About This Watch
The Audemars Piguet Royal Oak Chronograph 26240ST represents a major evolution for the Royal Oak chronograph family, introducing the fully in-house caliber 4401 with flyback functionality. This is the first time the standard steel Royal Oak Chronograph has featured a flyback function, allowing the chronograph to be reset and restarted with a single button press. The caliber 4401 delivers a 70-hour power reserve and features a column wheel integrated flyback chronograph mechanism that is visible through the sapphire caseback. The 41mm case maintains the same slim 11mm profile despite the more complex movement, a remarkable engineering achievement. The blue "Grande Tapisserie" dial features subtly redesigned chronograph counters with a 30-minute counter at 9 o'clock, 12-hour counter at 6 o'clock, and running seconds at 3 o'clock. The vertical-satin surface treatment on the sub-dial registers provides elegant contrast against the textured main dial. This reference represents Audemars Piguet's commitment to advancing the Royal Oak chronograph with fully proprietary technology while maintaining the design language that has made it an icon for over fifty years.
In-Depth Review
# The Royal Oak Chronograph 26240ST: Audemars Piguet's Accessible Icon
When Audemars Piguet refreshed its Royal Oak Chronograph line in 2023, the introduction of the 26240ST.OO.1320ST.06 signaled a deliberate commitment to accessibility within the brand's chronograph offerings. The blue "Grande Tapisserie" dial, a signature AP texture that has defined the collection since its 1972 debut, pairs with a robust 41mm stainless steel case and the proprietary Caliber 4401 movement—a purpose-built chronograph engine delivering a remarkable 70-hour power reserve. The 40-jewel automatic caliber operates at 28,800 vibrations per hour and features a flyback chronograph function with integrated date window, positioning this watch as both technically sophisticated and practically capable. The octagonal bezel, now mounted with exposed screws as a nod to historical design language, immediately identifies the wearer as someone versed in horological tradition.
This watch targets the established collector who prioritizes in-house engineering and design heritage over trends. The stainless steel construction makes it inherently more durable than precious metal alternatives for daily wear, while the integrated bracelet and 50-meter water resistance suggest genuine versatility. It's a watch for the professional who values mechanical precision without requiring complications beyond its scope.
At current market prices hovering around $55,000—nearly 45% above MSRP—the 26240ST competes directly with Rolex's Daytona and Omega's Speedmaster Professional. While the Rolex commands more immediate prestige and better holds value, and the Omega offers proven space heritage, the Audemars Piguet delivers superior in-house manufacturing and a power reserve that
Specifications
Movement
| Movement Type | Automatic |
|---|---|
| Caliber | AP 4401 |
| Power Reserve | 70 hours |
| Frequency | 28,800 vph |
| Jewels | 40 |
Case
| Case Diameter | 41.0mm |
|---|---|
| Case Thickness | 11.0mm |
| Case Material | Stainless Steel |
| Crystal | Sapphire |
| Bezel | Fixed, octagonal with exposed screws |
| Dial Color | Blue "Grande Tapisserie" |
| Lug-to-Lug | 47.0mm |
Features
| Water Resistance | 50m / 164ft |
|---|---|
| Bracelet/Strap | Stainless Steel integrated bracelet |
| Clasp | AP folding clasp |
| Weight | 165g |
| Complications |