Audemars Piguet Royal Oak Blue Dial 15510ST.OO.1320ST.06 41mm

The Blue Dial That Started Everything

Gerald Genta designed the Royal Oak in a single night in 1972. The blue dial was part of his original sketch and it has remained the signature colorway for over fifty years. The Grande Tapisserie pattern — a grid of small raised squares — plays with the blue tone to create depth that flat dials cannot match.

On the 15510 generation, AP refined the dial printing and improved the applied markers with a slightly deeper bevel. The date window at 3 o’clock uses a white background that contrasts cleanly against the dark blue. These are subtle changes, but they add up when you compare the 15510 to its predecessor directly. See every variant in the Royal Oak collection.

Current-Gen Bracelet and Movement

The biggest functional change from the 15500 to the 15510 is the bracelet. AP narrowed the links and adjusted the taper, so it drapes more naturally around the wrist. The clasp is also slimmer. These are the kind of details that matter after a full day of wearing the watch.

Under the caseback, the Caliber 4302 replaced the 3120. The jump from 60 to 70 hours of power reserve is useful if you rotate watches. The movement runs at 28,800 vibrations per hour, which is standard for modern automatics and keeps timekeeping accurate. This replica royal oak 15510ST blue reproduces both the visual and mechanical details of the current production piece.

Considering the grey alternative? The 15510ST grey offers a more neutral look. For questions about exchanges, visit our returns policy.