This replica Royal Oak 26574ST is one of the most mechanically ambitious references in the entire Royal Oak collection. The 26574ST.OO.1220ST.03 houses a perpetual calendar complication inside the familiar 41mm octagonal case, tracking day, date, month, leap year cycle, and moon phase without requiring manual correction until 2100. A blue Grande Tapisserie dial presents all this information through multiple subdials and apertures, adding functional density to a design that normally celebrates simplicity.

Build Details

• Case diameter: 41mm
• Case material: stainless steel
• Dial: blue Grande Tapisserie with perpetual calendar displays
• Bezel: octagonal stainless steel with 8 hexagonal screws
• Crystal: sapphire with anti-reflective coating
• Bracelet: integrated stainless steel with AP folding clasp
• Movement: automatic perpetual calendar
• Functions: hours, minutes, day, date, month, moon phase, leap year indicator

Perpetual calendar Royal Oaks occupy a specific space in the lineup. They carry the same case profile as the basic three-hand models but contain a movement with hundreds of additional components managing the calendar mechanism.

What Collectors Notice

The perpetual calendar adds four subdials to the Tapisserie background: day at 9, date at 6, month at 3, and moon phase between 10 and 11. A leap year indicator sits at 2 o’clock. Each subdial is recessed into the dial surface, maintaining the layered depth that the Tapisserie pattern creates. The 26574 in steel is particularly notable because Audemars Piguet historically reserved perpetual calendar Royal Oaks for precious metals. A steel perpetual calendar carries collector significance beyond its mechanical content. The 15500ST blue on rubber shows the same blue Tapisserie in its simplest form, while the full Royal Oak collection spans from three-hand to perpetual calendar and tourbillon.

This vs Other Versions

Compared to the time-only 15500ST, the 26574ST adds five indicators to the dial and roughly doubles the movement complexity. Compared to the rose gold perpetual calendar references, it trades precious-metal warmth for steel durability and a more understated wrist presence. The blue dial ties it visually to the mainstream Royal Oak palette, preventing the perpetual calendar from reading as an entirely separate watch. This replica Royal Oak 26574ST puts grand complication mechanics inside the most recognizable sport-watch case ever designed.