Watch of the Day · 2026-09-29 · from the archive
Audemars Piguet Royal Oak Perpetual Calendar Openworked
Ref. 25636PT · Platinum — one documented result from the 1,183-lot MostExpensiveWatches auction record, featured today.
An early platinum openworked perpetual calendar with rare midnight blue subsidiary dials and no leap year indicator.
The 2022 sale of this Audemars Piguet Royal Oak Perpetual Calendar Openworked ref. 25636PT in platinum for $695,000 at Phillips Geneva represents one of 65 documented Audemars Piguet results in the corpus, where the brand record is $7,736,000 for the Grosse Pièce in 2025. This early openworked platinum reference is significant to collectors for its specific configuration, which features rare midnight blue subsidiary dials and lacks a leap year indicator.
Full lot record & sources All Audemars Piguet results The Grail Index
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| 2026-10-02 | Voutilainen Vingt-8 | $138,176 · Sotheby's Hong Kong · 2024 |
| 2026-10-01 | A. Lange & Söhne Tourbillon 'Pour le Mérite' (1994) | $285,000 · Phillips Geneva · 2023 |
| 2026-09-30 | Voutilainen Reference 217QRS Retrograde Date | $146,050 · Sotheby's New York · 2023 |
| 2026-09-28 | Panerai Radiomir Guido Panerai & Figlio | $391,000 · Phillips Geneva · 2023 |
| 2026-09-27 | Bovet Miss Audrey Sweet Fairy Only Watch | $247,000 · Christie's Geneva · 2021 |
| 2026-09-26 | Panerai Radiomir Type C 'Helmut Rösel' | $112,000 · Phillips Geneva · 2017 |
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: 2026-09-29T00:15:10.577668+00:00