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Description
APSF Audemars Piguet Royal Oak 26240ST Khaki Green
The integration of the custom 4401 clone caliber finally brings genuine-spec 12.0mm thickness to the Royal Oak chronograph platform.
Powered by Super Clone 4401
The engineering core of this APSF release is the bespoke Super Clone 4401 caliber. Designed from the ground up to mimic the architecture of the genuine Audemars Piguet movement, it features a fully functional column wheel and vertical clutch mechanism, ensuring precise and crisp engagement of the chronograph pushers without the seconds hand stutter common in modular movements. The inclusion of a working flyback function allows the chronograph to be reset and restarted instantaneously, representing a significant technical leap for replica chronographs.
�� Accuracy Profile:
The custom 4401 clone caliber operates at 28,800 vph and is typically regulated at the factory to an accuracy of 卤5��8 seconds per day, delivering reliable chronometric performance for daily wear.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Flyback Chronograph, Small Seconds, Date
- �� Winding Direction: Bidirectional
Technical Specifications
THE BUILD316L Stainless Steel
The 41mm case strictly adheres to the 12.0mm thickness of the genuine piece. It exhibits meticulous brushed and polished alternating finishing, maintaining the sharp geometric angles the Royal Oak is known for.
THE DIALKhaki Green Grande Tapisserie
Featuring deeply recessed, sunburst-finished sub-dials and precise guilloch茅 squares. The white gold applied hour-markers are filled with highly legible Super-LumiNova.
THE BEZELOctagonal 316L Steel
The signature bezel features vertical brushing contrasted by highly polished chamfers, secured by eight perfectly aligned white gold hexagonal screws.
THE BRACELETIntegrated Steel Deployant
The integrated bracelet tapers elegantly to the AP double deployant clasp. APSF excels in the tight tolerances and smooth articulation of the connecting links.
Why APSF for This Reference?
Many collectors ask: ��Why not ZF?��
APSF is the premier specialist for the modern Royal Oak integrated chronograph platform, specifically due to their proprietary 4401 clone movement. Unlike ZF, which has historically relied on thicker modified architectures for their chronographs, APSF achieves the true 12.0mm thickness while offering superior brushed/polished alternating finishing on the bracelet links.
Full Disclosure: The custom 4401 movement, while structurally accurate, exhibits slightly more rotor noise than the genuine caliber during vigorous wrist movement.
LIVE PREVIEW
Data Sheet
| MODEL REFERENCE | 26240ST.OO.1320ST.04 |
| FACTORY / VERSION | APSF Edition |
| MOVEMENT | Super Clone 4401 Integrated Chronograph |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | 169.9g | 12.0mm |
| CRYSTAL & LUME | Sapphire with Colorless AR | Super-LumiNova |
| DIMENSIONS | 41mm � 51.5mm � 12.0mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 50m �� professional pressure test recommended before swimming |
Collector Q&A
Q: Does the flyback chronograph function work like the genuine caliber 4401?
A: Yes, the APSF Super Clone 4401 features a fully functional flyback mechanism, allowing you to reset and restart the chronograph with a single pusher press without stopping it first.
Q: How does the 12.0mm thickness compare to older Royal Oak chronograph replicas?
A: Older replicas utilizing modified Valjoux 7750 movements were noticeably thicker (often 14mm+) to accommodate the module. The APSF 4401 clone allows this 26240 to achieve the exact 12.0mm genuine-spec thickness.
Q: Is the Khaki Green dial color accurate to the 50th-anniversary release?
A: APSF has captured the military-inspired olive tone exceptionally well. While direct, harsh sunlight may reveal a slightly different sunburst refraction than genuine galvanic dials, the baseline hue and Grande Tapisserie texture are highly accurate.
Q: What is the most notable flaw or maintenance concern with the APSF 4401 movement?
A: While mechanically robust, the rotor on the clone 4401 caliber is known to be slightly noisier than the genuine movement during vigorous wrist movement. Additionally, we recommend avoiding rapid date changes between 10 PM and 2 AM to protect the date mechanism.
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