Audemars Piguet · Family: Royal Oak
The Audemars Piguet Royal Oak Perpetual Calendar (ref. 26574ST.OO.1220ST.03) is a 41mm stainless steel watch, with a blue 'Grande Tapisserie' dial and a full perpetual calendar — day, date, month, astronomical moon phase, and leap year. It runs the in-house Caliber 5134, automatic, just 9.5mm thick despite integrating the perpetual calendar complication, with ~40 hours of power reserve. Cazador has no verified price observations yet for this reference. Its differential: it pairs the perpetual calendar's high-watchmaking complication with a stainless steel case, a rarity within Audemars Piguet's complications catalog, traditionally reserved for precious metals.
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The Royal Oak Perpetual Calendar pairs two Audemars Piguet milestones: the octagonal steel case with screwed bezel that Gérald Genta designed in 1972 for the original Royal Oak, and the manufacture's tradition in perpetual calendars, a complication AP has pioneered since the 19th century thanks to its ability to mechanically track the Gregorian calendar — leap years included — for decades without manual intervention.
Historically, Audemars Piguet has reserved its perpetual calendar executions almost exclusively for precious metals — gold, platinum — given the prestige traditionally associated with this complication within high watchmaking. The appearance of stainless steel versions, like this reference 26574ST, introduced in 2023, marks a deliberate break from that convention, bringing the complication into a material Audemars Piguet usually associates with the Royal Oak's sportier executions.
Beneath the blue dial with its 'Grande Tapisserie' pattern — the raised waffle-like motif characteristic of the Royal Oak since its creation — sits the in-house Caliber 5134, an automatic movement that packs the full perpetual calendar mechanics (day, date, month, astronomical moon phase, and leap year) into a case just 9.5mm thick, a notably compact figure for a complication of this mechanical density.
The applied white gold indexes, treated with luminescent material, and the bezel insert in the same blue tone as the dial, reinforce this execution's color coherence. The transparent sapphire case back allows a view of Caliber 5134's finishing and architecture from the reverse.
This is the fourth Royal Oak family reference Cazador adds — after the 39mm Jumbo, the 41mm Selfwinding, and the 37mm Selfwinding already in the catalog — and the first with a perpetual calendar complication.
Cazador has no verified price observations for this reference (n=0 as of today). We do not publish estimates without our own sourced market data.
It's a mechanical complication capable of correctly tracking the length of each month — leap years included — without manual adjustment for decades, until the mechanism falls out of sync with the Gregorian calendar in the year 2100.
Because Audemars Piguet has traditionally reserved its perpetual calendars for precious metals like gold or platinum. Steel executions, like this 26574ST introduced in 2023, are an exception within the brand's complications catalog.
9.5mm, a compact figure given the mechanical density of the perpetual calendar complication packed into Caliber 5134.
Roughly 40 hours.
Day of the week, date, month, astronomical moon phase, and leap year — the full set of indications typical of a perpetual calendar.
The manufacture's tradition in this complication dates back to the 19th century, pioneering perpetual calendars within high-end Swiss watchmaking.