APSF Edition — Integrated Steel Bracelet
APSF’s release of the 26331ST marks a significant technical milestone in Royal Oak chronograph replication. By successfully engineering an integrated clone of the Calibre 2385, this edition finally resolves the historical dimensional inaccuracies that plagued earlier iterations.
Powered by the APSF Super Clone Calibre 2385, this mechanism eliminates the need for bulky 7750 base movements with add-on modules. The integrated architecture ensures correct sub-dial spacing at 3, 6, and 9 o’clock while maintaining full chronograph functionality. Power reserve is rated at approximately 36 hours.
Crafted from 316L solid stainless steel, the case achieves the critical 10.6mm genuine thickness, weighing in at a substantial 185g. The Grande Tapisserie white dial features crisp, well-defined squares with a subtle sheen, complemented by brushed and polished alternating finishing on the integrated bracelet fit.
- Movement: APSF Super Clone Cal. 2385 — Approximately 36 hours
- Case Material: 316L Stainless Steel, 41mm diameter, 51mm lug-to-lug, 185g weight
- Bezel: 316L Steel with precisely recessed hex screws
- Crystal: Sapphire with AR Coating
- Bracelet: Integrated 316L Steel, alternating finish, AP folding clasp
- Water Resistance: 30m / 3 ATM — professional pressure test recommended before swimming. Do not operate chronograph pushers or the crown while the watch is submerged.
This reference serves the collector seeking a highly accurate mechanical chronograph without the dimensional compromises of past replicas. It sits comfortably under a dress cuff while maintaining the distinct, angular wrist presence expected from a Royal Oak.

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