APSF Edition — Integrated Stainless Steel Bracelet
The APS Factory iteration of the Royal Oak 15500ST establishes a distinct horological benchmark for the slate grey reference. Within collector circles, this specific release is noted for its highly accurate alternating brushed and polished case finishing, alongside a remarkably precise integrated bracelet fit that mirrors the genuine geometry.
At the core of this model is the Clone Calibre 4302, a true integrated mechanism rather than a decorated base movement. This architecture ensures correct balance wheel placement and date wheel depth. Consistent with mechanical testing of this caliber, the power reserve is approximately 36 hours.
The 41mm stainless steel case is machined with distinct bevels that transition cleanly between brushed surfaces and polished chamfers. The slate grey Grande Tapisserie dial achieves an accurate monochromatic sunburst effect, shifting dynamically from light grey to dark charcoal under varying lighting conditions.
- Movement: Clone Calibre 4302 — Approximately 36 hours
- Case Material: 316L Stainless Steel, 41mm diameter, 51mm lug-to-lug, ~165g
- Bezel: 316L Stainless Steel, accurate brushed finish with polished hexagonal screws
- Crystal: Sapphire with colorless anti-reflective coating
- Bracelet: Integrated 316L stainless steel, brushed finish, AP folding clasp
- Water Resistance: 50m Stated — have the case pressure-tested by a professional prior to swimming. Do not operate chronograph pushers or the crown while the watch is submerged.
This reference suits collectors seeking a versatile, understated sports watch with strong monochromatic appeal. The rigid first links of the 41mm geometry require a medium to large wrist for optimal drape and comfort.

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