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Description
APSF Audemars Piguet Royal Oak 15400 Black Dial
The APSF 15400 stands as a technical benchmark for 41mm Royal Oak replicas due to its genuine-spec case construction and custom Caliber 3120 architecture.
At the Core �� Custom Caliber 3120 Clone
The APSF utilizes a ground-up custom clone of the Audemars Piguet Caliber 3120, a significant departure from earlier iterations that relied on decorated Miyota 9015 base movements. This integrated structure allows for the correct positioning of the balance wheel and a more accurate representation of the 22K gold-toned rotor engraving. The movement is rigorously tested to meet , ensuring reliable amplitude and beat error metrics out of the box.
�� Accuracy Profile:
Regulated to approximately 卤8��12 seconds per day. The custom architecture provides stable timekeeping, though it lacks the micro-stellar adjustment found on the genuine, relying instead on a traditional regulating pin.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Hours, minutes, center seconds, and quick-set date at 3 o��clock
- �� Winding Direction: Bidirectional automatic winding
Technical Specifications
THE BUILD316L Stainless Steel
Measuring exactly 41mm in diameter and 9.8mm thick, the case features genuine-spec three-piece construction, allowing for 1:1 part interchangeability with OEM components.
THE DIALBlack Grande Tapisserie
The dial exhibits a highly accurate galvanic black tone. The guilloch茅 squares are sharply defined, with applied white gold-toned indices filled with Swiss-grade luminescent material.
THE BEZELBrushed Steel with Polished Chamfers
The iconic octagonal bezel showcases meticulous linear brushing, contrasted by high-polish chamfered edges and recessed, perfectly aligned white gold-toned hexagonal screws.
THE STRAPVulcanized Rubber with Deployant
Fitted with a premium black rubber strap utilizing a movable link design at the case head for an ergonomic fit, secured by a precisely engraved AP folding clasp.
APSF vs. the Alternatives
One recurring question: ��Why not ZF?��
While ZF produces excellent Royal Oak variants, APSF is widely recognized as the superior choice for the 15400 reference specifically due to its custom Caliber 3120 movement and 1:1 case geometry. ZF��s earlier iterations often relied on decorated Miyota movements, which resulted in thicker case profiles and a noticeable rotor stutter. APSF��s dedication to interchangeable case parts and accurate brushed/polished alternating finishing makes it the definitive choice for this specific model.
Full Disclosure: The custom Caliber 3120 clone, while visually accurate and structurally sound, can exhibit faint rotor bearing noise in completely silent environments, a common trait among non-OEM automatic winding systems.
Reference Data
| MODEL REFERENCE | 15400ST.OO.1220ST.01 (Rubber Strap Variant) |
| FACTORY / VERSION | APSF Edition |
| MOVEMENT | Custom Caliber 3120 Clone |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | 105g | 9.8mm |
| CRYSTAL & LUME | Sapphire with AR coating | Swiss Super-LumiNova |
| DIMENSIONS | 41.0mm � 51.5mm � 9.8mmDimensions are taken manually and may vary slightly. |
| WATER RESISTANCE | 50m stated rating �� we advise a professional pressure test before any water exposure |
Related References
Questions from Collectors
Q: Does the APSF 15400 case accept genuine Audemars Piguet parts?
A: Yes, the APSF case is constructed to 1:1 specifications, meaning the bezel, crystal, and caseback dimensions align with the genuine architecture, allowing for potential franken builds with OEM components.
Q: How does the custom Caliber 3120 in the APSF differ from older Miyota-based versions?
A: The APSF utilizes a custom-built clone movement rather than a decorated Miyota 9015. This results in correct balance wheel positioning, accurate 9.8mm case thickness, and eliminates the prominent seconds-hand stutter sometimes seen in heavily modified Miyota calibers.
Q: Is the black dial tone accurate to the OEM Royal Oak 15400?
A: The APSF black dial captures the correct galvanic tone and the ��Grande Tapisserie�� guilloch茅 pattern depth is highly accurate. However, under heavy macro magnification, the microscopic concentric circles within the squares are marginally less pronounced than on the genuine dial.
Q: Is the rotor noise noticeable on this clone Caliber 3120?
A: While significantly quieter than older Miyota-based replicas, the custom 3120 clone can still produce a faint unidirectional winding whir in silent environments. A light application of Moebius 9010 oil to the rotor bearings by a watchsmith can effectively mitigate this.
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