Watch of the Day · 2026-07-20 · from the archive
Audemars Piguet Royal Oak Skeletonized Perpetual Calendar
Ref. 25829BA · 18k Yellow Gold — one documented result from the 1,156-lot MostExpensiveWatches auction record, featured today.
A rare yellow gold skeletonized version of the Royal Oak QP, combining the brand's most iconic design with high-level hand-finishing and transparency.
The 2022 sale of this Audemars Piguet Royal Oak Skeletonized Perpetual Calendar ref. 25829BA for $138,915 at Christie's Geneva documents the market for rare, 18k yellow gold iterations of the brand's iconic design. Featuring high-level hand-finishing and transparency, it is one of 65 documented Audemars Piguet results in our corpus. While the brand record stands at $7,736,000 for the Grosse Pièce, this result provides a specific data point for skeletonized complications.
Full lot record & sources All Audemars Piguet results The Grail Index
Previous watches of the day
| Date | Watch | Result |
|---|---|---|
| 2026-08-20 | Audemars Piguet Jumping Hour (circa 1928) | $1,016,000 · Christie's New York · 2026 |
| 2026-08-19 | George Daniels Anniversary | $452,700 · Phillips Geneva · 2019 |
| 2026-08-18 | Richard Mille Felipe Massa 'White Demon' | $378,000 · Christie's Dubai · 2023 |
| 2026-08-17 | Rolex Daytona 'The Legend' | $3,726,000 · Phillips Geneva · 2017 |
| 2026-08-16 | Audemars Piguet Royal Oak Perpetual Calendar | $398,000 · Sotheby's Geneva · 2022 |
| 2026-08-15 | Greubel Forsey GMT Balancier Convexe (1 of 1) | $302,400 · Christie's Dubai · 2025 |
| 2026-08-14 | Rolex GMT-Master "Marlon Brando" | $1,952,000 · Phillips New York · 2019 |
| 2026-08-13 | George Daniels Anniversary | $1,260,614 · Phillips Geneva · 2023 |
| 2026-08-12 | Greubel Forsey Invention Piece 2 | $423,395 · Christie's Hong Kong · 2024 |
| 2026-08-11 | Cartier Tank Louis Cartier | $379,500 · Christie's New York · 2017 |
| 2026-08-10 | Vacheron Constantin Chronograph | $150,000 · Phillips Geneva · 2016 |
| 2026-08-09 | Greubel Forsey Double Tourbillon 30° | $225,806 · Phillips Hong Kong · 2016 |
| 2026-08-08 | Greubel Forsey Balancier Convexe S² Carbon | $176,400 · Christie's Dubai · 2025 |
| 2026-08-07 | Urwerk Maltese Falcon | $133,197 · Phillips Geneva · 2024 |
About this series
Every day MostExpensiveWatches features one documented auction result from its comp corpus — hammer prices with primary sources, the record layer behind the Grail Index and the daily Price Index. Machine-readable: /data/watch-of-the-day.json. Cite as “MostExpensiveWatches Watch of the Day”.
Compiled: 2026-07-20T00:15:10.941139+00:00