This is a custom AP 15500ST blue dial – one of the most iconic Royal Oaks. Let’s go through the spec:
Movement: Custom 4302 with re‑engraved bridges and a non‑indexed weighted balance – that’s a big deal. It means the movement not only looks closer to the genuine but also has better regulation.
Dial: Blue aftermarket dial with clear “cookie” (tapisserie) pattern and strong sunburst – the two things that make a Royal Oak dial pop.
Date wheel: Swiss ink printing – crisp and legible.
Hands: Swiss‑craft, solid axles, bright edges – no cheap finishing.
Bezel screws: Recessed – correct, below the bezel surface.
Case & bracelet: Both have been re‑finished – the case gets secondary polishing for better shine, and the bracelet is brushed after fine polishing to ensure the brushing lines are continuous and match the genuine’s grain count. That’s attention to detail.
Clasp: Molded from original, logo aligned, functions correct.
Assembly: Dust‑free under 10x – no debris.
Bottom line: This is a solid, high‑end custom 15500ST. The movement upgrade to non‑indexed balance is a step above most standard customs. The case and bracelet finishing is where many builds fail, but here they’ve done secondary polishing and careful brushing. If you’re after a top‑tier blue Royal Oak that feels and looks right, this spec delivers.