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Description
APSF Audemars Piguet Royal Oak Chronograph 26240BA Smoky Blue
The APSF iteration establishes a distinct technical benchmark by housing a genuinely integrated Calibre 4401 clone within a precise 12mm case profile.
Powered by Clone Calibre 4401
The development of the clone Calibre 4401 marks a departure from the historical reliance on modified A7750 base movements. By engineering a fully integrated chronograph architecture from the ground up, APSF has eliminated the need for a piggyback module. This allows the movement to feature a functional column wheel for crisp pusher engagement, correct subdial pinion spacing, and a date disc that sits flush against the dial window without the sunken appearance typical of older replicas. The finishing includes correct c么tes de Gen猫ve and perlage on the bridges, visible through the exhibition caseback.
�� Accuracy Profile:
The clone Calibre 4401 is factory-regulated to an operational variance of 卤15 seconds per day. While mechanical chronographs are sensitive to positioning and power reserve states, this movement provides reliable daily timekeeping when fully wound.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Hours, minutes, small seconds, quick-set date, fully functional integrated chronograph
- �� Winding Direction: Bidirectional automatic winding
Technical Specifications
THE BUILDYellow Gold Plated Stainless Steel
Machined to a verified 12mm thickness and weighing 167.3g. The case exhibits the correct alternating brushed and polished finishing ratio, capturing the sharp, geometric light play inherent to the Royal Oak design.
THE DIALSmoky Blue Grande Tapisserie
The smoky blue dial features sharp, precise printing and correct lacquer thickness. The tapisserie squares display the proper concentric circular graining under macro inspection, paired with evenly applied luminescent markers.
THE BEZELOctagonal Gold Tone
The iconic octagonal bezel is secured with correct white gold-plated hexagonal screws. The vertical brushing aligns perfectly across the bezel surface, separated by a high-polish chamfered edge.
THE BRACELETIntegrated Articulated Links
The bracelet features solid end links with strict tolerances, minimizing horizontal endplay. The double-deployant AP folding clasp engages securely with a crisp mechanical click.
Why APSF for This Reference?
Many collectors ask: ��Why not ZF?��
When evaluating the 26240 series, APSF is the definitive choice due to their exclusive access to the integrated Calibre 4401 clone. This movement architecture is solely responsible for allowing the case to reach the verified 12.0mm thickness. Competing versions from other factories often rely on thicker modular movements, resulting in cases that bloat past 14mm and ruin the ergonomic profile of the Royal Oak.
Full Disclosure: While the yellow gold PVD plating is visually accurate in tone, the stainless steel core yields a total weight of 167.3g. This feels substantial on the wrist but naturally lacks the heavy mass of a solid 18k gold genuine piece.
LIVE PREVIEW
Data Sheet
| MODEL REFERENCE | 26240BA |
| FACTORY / VERSION | APSF Edition |
| MOVEMENT | True 1:1 Clone Calibre 4401 |
| CASE MATERIAL | Yellow Gold Plated Premium Stainless Steel |
| WEIGHT & THICKNESS | 167.3g | 12.0mm |
| CRYSTAL & LUME | Sapphire with AR Coating | Super-LumiNova |
| DIMENSIONS | 41mm � 51mm � 12.0mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 30m stated rating �� professional pressure test recommended before swimming |
Collector Q&A
Q: Does the APSF Calibre 4401 have the correct subdial spacing for the 26240?
A: Yes. Unlike older replicas that used modified A7750 movements with piggyback modules, the APSF integrated clone movement ensures the subdials are spaced precisely as on the genuine 26240, eliminating the ��crowded dial�� flaw of previous generations.
Q: Is the 12mm case thickness accurate to the genuine Royal Oak Chronograph?
A: The APSF achieves a verified 12.0mm thickness, which is remarkably close to the genuine 26240��s 12.4mm profile. This slim profile is a direct result of utilizing the integrated clone movement rather than a modular chronograph layer.
Q: How durable is the yellow gold finish on the APSF 26240BA?
A: APSF utilizes a high-grade PVD plating process over a solid stainless steel core. While highly resistant to daily friction and fading, deep scratches from abrasive surfaces will reveal the steel beneath. Care should be taken as with any plated watch.
Q: What is a known quirk of the APSF 4401 chronograph movement?
A: The chronograph pushers require a slightly firmer press to engage the column wheel compared to the genuine AP calibre. Additionally, it is highly recommended not to leave the chronograph running continuously, as it will drain the 36-hour power reserve more rapidly and increase wear on the mechanism.