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Description
APSF Audemars Piguet Royal Oak Reference 15400ST
A definitive technical achievement featuring a bespoke clone caliber and precise case geometry.
Powered by True Clone Calibre 3120
The APSF Calibre 3120 is a dedicated clone movement designed specifically for the 15400 platform. Unlike earlier generations that relied on heavily modified Miyota 9015 bases with decorative plates, this caliber is engineered from the ground up to replicate the genuine architecture. This results in the correct balance wheel placement, accurate jewel mapping, and a 22K gold-plated rotor that spins with appropriate inertia. The direct-drive seconds hand eliminates the stuttering issue inherent to indirect gear trains, providing a fluid 28,800 vph sweep.
This true-clone caliber is typically regulated to a variance of 卤10��15 seconds per day. While highly stable, the complex architecture requires careful initial winding to establish optimum mainspring torque.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Center hours, minutes, sweeping seconds, and instantaneous date at 3 o��clock
- �� Winding Direction: Bidirectional automatic winding via central rotor
Technical Specifications
Measuring 41mm in diameter with a thickness of 9.8mm, the case exhibits exceptional alternating brushed and polished finishes. The lug plots are machined to precise tolerances for the integrated strap.
The dial features the signature textured squares in a deep (#003A70) tone. The AP logo application and date wheel typography are highly accurate to the original reference.
The iconic octagonal bezel features a vertical brush finish with highly polished chamfered edges. The eight hexagonal screws are properly recessed and aligned.
Constructed from high-grade, dust-resistant elastomer, the strap integrates flawlessly with the case plots and secures via a finely finished stainless steel folding deployant clasp.
Why APSF for This Reference?
Many collectors ask: ��Why not ZF Factory?��
While ZF produces an exceptional Royal Oak, APSF is currently the benchmark for the 15400 due to their proprietary Calibre 3120 clone. This movement allows for an exact 1:1 crown position, whereas older or competing iterations often suffered from slightly lowered crown guards to accommodate base movement stems. Furthermore, APSF��s mastery of the case finishing yields sharper transitions between brushed flats and polished bevels.
Full Disclosure: The true-clone Calibre 3120 can exhibit slight rotor bearing noise during vigorous wrist movement, and the blue dial lacks the dynamic galvanic shift seen on the genuine under direct sunlight.
Data Sheet
| MODEL REFERENCE | Royal Oak 15400ST.OO.1220ST.03 (Rubber Configuration) |
| FACTORY / VERSION | APS Factory Edition |
| MOVEMENT | Super Clone Calibre 3120 |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | ~120g | 9.8mm |
| CRYSTAL & LUME | Sapphire with AR | Super-LumiNova |
| DIMENSIONS | 41.0mm � 50.5mm � 9.8mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 50m Stated �� professional pressure test recommended before swimming |
Collector Q&A
Q: Does the APSF Calibre 3120 have the ��Miyota stutter�� found in older 15400 replicas?
A: No. The APSF utilizes a true ground-up clone of the Calibre 3120, eliminating the indirect seconds gear train of the Miyota 9015. This results in a smooth 28,800 vph sweep and allows for the correct crown height positioning.
Q: How accurate is the blue dial color on this APSF 15400 compared to genuine?
A: The APSF captures the correct navy tone effectively in low to medium light. However, it lacks the exact dynamic galvanic color shift of the genuine Audemars Piguet dial under direct sunlight, appearing slightly darker overall.
Q: Can I swap the rubber strap for an APSF stainless steel bracelet later?
A: Yes. The case lugs and plotting on the APSF 15400 are machined to 1:1 dimensions, allowing for seamless swapping between their integrated rubber strap and the APSF stainless steel bracelet.
Q: What is the main drawback of the APSF clone 3120 movement?
A: While highly accurate visually with a well-decorated 22K gold-plated rotor, the automatic winding mechanism can exhibit slight rotor bearing noise during vigorous wrist movement. This is a known quirk inherent to this specific clone caliber��s architecture.
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