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Stainless steel · blue Grande Tapisserie dial · 41 mm
A perpetual calendar that will not need correcting until 2100, in the steel sports case that made the complication look casual.
A perpetual calendar carries a mechanical memory of the Gregorian calendar: month lengths, and the four-year leap cycle. Kept running, the 26574 will not need a date correction until the year 2100, when the calendar skips a leap year that the mechanism cannot know about.
Audemars Piguet lays it out across four subdials — day, date, month with leap year, and an astronomical moon — with the week of the year around the outer flange. It is a great deal of information on a 41 mm dial, and the Grande Tapisserie pattern underneath is what stops it reading like an instrument panel.
Putting this complication in a steel sports case is the part that mattered historically. Perpetual calendars belonged in gold on leather; the Royal Oak made one you could wear with a shirt and not think about, and that is still why people want this reference specifically.
| 26574ST | 26579CE | |
|---|---|---|
| Case and bracelet | Stainless steel | Black ceramic |
| Dial | Blue Grande Tapisserie | Black Grande Tapisserie |
| Wear | Shows hairlines, can be refinished | Resists scratches, chips on a hard knock |
| Calibre | 5134 | 5134 |
The same perpetual calendar in two cases. Steel is the classic Royal Oak; ceramic is the darker, lighter watch, and harder to restore if it is ever damaged.
| 26574ST | 26240ST | |
|---|---|---|
| Complication | Perpetual calendar | Flyback chronograph |
| Calibre | 5134 | 4401 |
| Case flank | Recessed calendar correctors | Two chronograph pushers |
| If you let it stop | The calendar has to be reset properly | Set the time and go |
Both are 41 mm steel Royal Oaks with a blue dial. The perpetual calendar wants wearing or a winder; the chronograph forgives a drawer.
See the 26240STEach page is a guide to the reference and how we source it, not a listing. If yours is not here, ask anyway.
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Patek Philippe Nautilus Travel Time Chronograph 5990/1A Read more Nothing on this page is stock. A steel perpetual calendar Royal Oak is allocated, not stocked.
The dial colour and whether steel is the requirement. The same complication exists in gold, ceramic and titanium, and each is a different search.
Confirmed for each request from our network. This is a low-production reference in a high-demand case, so we tell you what is realistic before you commit.
Box, warranty documentation, booklets, the calendar setting tool and any additional links are itemised for the individual watch.
For a perpetual calendar we confirm the calendar is running correctly, when it was last serviced, and whether it has been left to stop and reset. Condition of the brushed and polished surfaces is reported separately.
Send the reference by WhatsApp or the form, with the dial, set and timing that matter to you. A collection or a style is enough to begin.
We go to our network rather than a boutique list, and come back with what is realistic on availability and timing before you commit to anything.
Condition, documents and what accompanies the watch are set out in writing for the individual piece we propose. You decide with the details in front of you.
Bank transfer in any major currency, or crypto. Collection in London or fully insured delivery, agreed for the watch and the destination.
Any brand, any reference, whether or not it appears on this site. Tell us what you have in mind and we take it from there.
2100 is not a leap year under the Gregorian calendar, but the mechanism assumes every fourth year is. The watch will need a one-day correction then, and not before, provided it is kept running.
Nothing is damaged, but the calendar has to be reset, which on a perpetual is a procedure rather than a twist of the crown. It is worth having done properly, and we tell you the setting position of any watch we propose.
A perpetual calendar is more sensitive to a lapsed service than a time-only watch. We report the documented service history for the individual piece and tell you where it sits against the maker's interval.
Yes. Bank transfer in any major currency, or crypto; Bitcoin (BTC), Ethereum, USDT and other major coins and stablecoins are accepted. The coin, network and amount are confirmed with you before any transfer.
An exact reference or an idea is enough to start the conversation. We will take care of the search and discuss the options with you.
