A perpetual calendar that reads the date, day, month, moon phase, and leap year cycle without manual correction until the year 2100. This replica royal oak 26574ST houses all of that complexity inside a steel case measuring just 10.1 mm thick, a figure that most three-hand watches struggle to match. The blue Grande Tapisserie dial organizes four sub-dials with a clarity that belies the mechanical density beneath it.
Reading the Perpetual Calendar Dial
The four sub-dials follow AP’s established layout for the Royal Oak perpetual calendar. At twelve o’clock, the month indicator. At three, the date hand sweeps a scale from 1 to 31. The day of the week sits at nine. And at six, an astronomical moon phase disc tracks the lunar cycle with a precision that drifts by one day every 125 years.
Between the month and day sub-dials, a small aperture displays the leap year indicator, cycling through the four-year pattern without any user input. The Cal. 5134 operates at a deliberate 19,800 vph, a frequency chosen to reduce strain on the calendar mechanism’s switching components. It is an engineering decision that prioritizes longevity over the smoother sweep that higher beat rates provide. Explore all perpetual calendar options in our Royal Oak section.
Steel Over Precious Metal
The 26574ST in stainless steel occupies a specific position in the Royal Oak perpetual calendar range. Where the rose gold 26574OR signals formality, the steel version integrates into daily rotation more easily. The weight difference is noticeable on the wrist, and the brushed finishing on the case and bracelet handles contact marks with less anxiety than a soft gold alloy.
At 20 meters, the water resistance rating is lower than the standard Royal Oak’s 50 meters. This is a direct consequence of the thin caseback required to house the replica royal oak 26574ST perpetual calendar movement without adding bulk. It means this is not a watch for the pool, but it handles rain, hand washing, and incidental exposure without concern. Review our return policy for complete purchase terms.
| Reference | 26574ST.OO.1220ST.03 |
| Case | 41 mm · Stainless steel |
| Bezel | Octagonal · 8 hexagonal screws |
| Dial | Blue · Grande Tapisserie · 4 sub-dials |
| Crystal | Sapphire · AR coating |
| Caliber | 5134 · Automatic · 52h reserve |
| Bracelet | Stainless steel integrated · AP folding clasp |
| Buckle | Stainless steel · AP folding clasp |
| Water | 20m / 2 ATM |
| Functions | Hours, Minutes, Perpetual Calendar (Day, Date, Month, Astronomical Moon Phase, Leap Year) |
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