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Description
APSF Audemars Piguet Royal Oak Chronograph 26331ST
By successfully engineering an integrated clone of the Calibre 2385, APSF has eliminated the dimensional compromises that previously defined replica Royal Oak chronographs.
Powered by APSF Super Clone Calibre 2385
This integrated column-wheel chronograph movement represents a significant horological milestone in the replica market. By abandoning the modular 7750 approach, APSF ensures correct sub-dial spacing and genuine-spec case thickness. The regulation method utilizes a standard index system, providing reliable daily performance while maintaining proper hand-stack clearances.
�� Accuracy Profile:
Typically regulated to 卤8��12 s/day. As a complex integrated chronograph clone, consistent winding habits are recommended to maintain amplitude.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Hours, minutes, sub-seconds, 12-hour chronograph, date
- �� Winding Direction: Unidirectional
Technical Specifications
THE BUILD316L Stainless Steel
Achieves the critical 10.6mm thickness profile. The 41mm case exhibits strict adherence to the genuine brushed/polished alternating finishing ratio across the octagonal geometry.
THE DIALGrande Tapisserie
Features sharp square plateau edges and distinct circular graining within the sub-dials. The white dial tone avoids the overly silver hue seen in older replica batches.
THE BEZELPolished Chamfered Steel
Vertical brushing aligns perfectly with the case body, secured by recessed hex screws that sit flush below the bezel surface.
THE BRACELETIntegrated AP Deployant
Features precise tolerances at the end-links, minimizing lateral play. The double deployant clasp operates with clean, tactile feedback.
Why APSF for This Reference?
Many collectors ask: ��Why not ZF?��
While ZF produces excellent standard Royal Oaks, APSF��s monopoly on the truly integrated Calibre 2385 clone makes them the sole choice for a 1:1 thickness 26331ST. Modular chronographs from rival factories inherently suffer from sunken date wheels and incorrect 14mm+ case profiles.
Full Disclosure: The date wheel font on the APSF is slightly thicker than genuine, and chronograph pusher feel is stiffer than the authentic piece.
Data Sheet
| MODEL REFERENCE | 26331ST.OO.1220ST.03 |
| FACTORY / VERSION | APSF Edition |
| MOVEMENT | APSF Super Clone Calibre 2385 |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | 185.7g | 10.6mm |
| CRYSTAL & LUME | Sapphire with AR Coating | Standard Super-LumiNova |
| DIMENSIONS | 41mm � 51mm � 10.6mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 30m / 3 ATM �� professional pressure test recommended before swimming |
Collector Q&A
Q: Does the APSF Calibre 2385 have a sunken date wheel like older 7750 versions?
A: No. Because the APSF utilizes an integrated clone movement rather than a modular 7750 base, the date wheel sits flush against the dial surface, accurately reflecting the genuine architecture.
Q: Are all three chronograph sub-dials fully functional?
A: Yes. The 3 o��clock sub-dial tracks 30 minutes, the 9 o��clock tracks 12 hours, and the 6 o��clock provides running seconds, mirroring the genuine Calibre 2385 layout.
Q: How does the 10.6mm thickness compare to the authentic 26331ST?
A: The APSF achieves the exact 10.6mm thickness of the genuine article. This is a direct result of the integrated movement, whereas older replicas routinely measured over 14mm.
Q: What is the most notable flaw on this APSF release?
A: The date wheel font print is marginally thicker than the genuine counterpart. Additionally, the mechanical resistance of the chronograph pushers is stiffer, requiring more deliberate pressure to actuate.
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