APSF Specialized Master Curation

Audemars Piguet Royal Oak Chronograph 26331ST
41mm White Dial “Panda” Edition

Name: Audemars Piguet Super Clone Royal Oak White Dial 26331ST Chronograph 41mm
SKU: 4684
Availability: InStock

A landmark achievement in structural cloning, eliminating the dimensional compromises of older replica chronographs. Powered by a bespoke, integrated Calibre 2385 movement, this 41mm APSF reference achieves an ultra-thin 10.6mm profile alongside true sub-dial spacing and flush date execution.

I / Chronometric Calibre Performance

The bespoke APSF Super Clone Calibre 2385 movement serves as the mechanical heart of this reference. Abandoning modular 7750 transfer-gear setups, this integrated column-wheel engine places the date disc flush against the dial face without a sunken appearance. Running seconds operate at 6 o’clock, with 30-minute and 12-hour chronograph totalizers at 3 and 9 o’clock, delivering a stable 36-hour power reserve.

▹ Integrated APSF Calibre 2385 Column-Wheel Chronograph Engine
▹ Flush Non-Recessed Date Window Alignment at 4:30 Position
▹ Fully Functional Totalizers (Running Seconds at 6 O’Clock)

II / Material Execution & Casing Parity

Cold-forged 316L stainless steel constructs the 41mm case shell to a verified 10.6mm thickness profile and 185.7g mass. The white Grande Tapisserie dial presents sharp plateau edges with concentric circular graining on the dark sub-dials. Eight recessed white gold-plated hexagonal screws secure the vertically brushed octagonal bezel, complemented by an integrated AP steel bracelet with fluid link articulation.

▹ Milled 316L Steel Case Shell (Verified 10.6mm Profile | 185.7g Mass)
▹ Crisp White Grande Tapisserie Dial with Circular Grained Sub-Dials
▹ Integrated Steel Bracelet with Tactile Double-Deployant AP Clasp

Factory Curation Analysis — APSF Benchmarks

Collectors select APSF as the definitive choice for the Royal Oak Chronograph 26331ST reference due to their monopoly on the integrated Calibre 2385 clone movement. Rival builds using modified Valjoux 7750 movements inherently suffer from sunken date wheels and inflated case profiles exceeding 14mm. APSF’s dedicated architecture achieves the exact 10.6mm thickness and proper sub-dial spacing of original boutique models.

Atelier Technical Disclosure: Under high-magnification loupe inspection, the date wheel typography is marginally thicker than genuine AP printing. Additionally, the mechanical resistance when actuating the screw-down chronograph pushers is stiffer than the authentic mechanism.

Technical Data Sheet

MODEL REFERENCE	26331ST.OO.1220ST.03
FACTORY EDITION	APSF Edition
MOVEMENT ENGINE	APSF Super Clone Calibre 2385 Integrated Automatic Chronograph
DIAL & BEZEL	White Grande Tapisserie \| Octagonal Bezel with Recessed Screws
CASE METALLURGY	Milled 316L Stainless Steel Shell (Alternating Brushed/Polished Finish)
STRAP & CLASP	Integrated Steel Bracelet with Double-Deployant AP Folding Clasp
MASS & THICKNESS	185.7 Grams Total Mass \| Verified 10.6 mm Profile Thickness
CRYSTAL & LUME	AR-Coated Sapphire Glass \| Standard Swiss Super-LumiNova
CASE DIMENSIONS	41.0 mm Diameter × 51.0 mm Lug-to-Lug
HYDROSTATIC RATING	30m / 3 ATM Stated (Atelier Pressure Test Recommended)

Collector FAQ & Technical Insights

Does the APSF Calibre 2385 have a sunken date wheel like older 7750 versions?
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No. Because APSF utilizes an integrated clone movement rather than a modular 7750 base, the date wheel sits flush against the dial surface, accurately reflecting genuine architecture.

Are all three chronograph sub-dials fully functional?
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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 genuine Calibre 2385 operations.

How does the 10.6mm thickness compare to the authentic 26331ST?
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The APSF achieves the exact 10.6mm thickness of genuine models as a direct result of the integrated movement design, whereas older modular replicas routinely measured over 14mm.

What is the primary known technical detail on this APSF release?
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The date wheel typography print is marginally thicker than genuine printing under a loupe, and the mechanical resistance of the chronograph pushers is slightly stiffer during actuation.

Atelier Diagnostics & Verification

Every Royal Oak Chronograph 26331ST reference passes multi-position timegrapher calibration and macro photo evaluation prior to dispatch. To view additional models, feel free to explore our full Audemars Piguet collection.

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