APSF Edition — Quick-Release Rubber Strap
The APSF iteration of the Royal Oak Offshore Diver 15720ST has established a firm consensus among horological enthusiasts for its structural fidelity. By successfully reverse-engineering the proprietary one-click strap mechanism and utilizing a custom movement architecture, this release bridges the gap between aesthetic replication and mechanical function.
Powering the timepiece is the custom integrated Caliber 4308 clone movement. Unlike previous iterations that relied on decorated base calibers, this movement features real, movable gears for the instantaneous date jump function and deep CNC engraving on the bridges. It yields a power reserve of approximately 36 hours, ensuring reliable daily operation.
The 42mm stainless steel case exhibits highly accurate brushed/polished alternating finishing, seamlessly integrating with the octagonal bezel. The dial features the signature Méga Tapisserie pattern in a deep navy blue tone, complemented by white gold-style applied hour markers and a functional inner rotating dive scale.
- Movement: Clone Caliber 4308 — Approximately 36 hours
- Case Material: 316L Stainless Steel, 42mm diameter, 14.2mm thickness
- Bezel: Brushed stainless steel with inner rotating diver scale
- Crystal: Scratch-resistant sapphire with colorless AR coating
- Bracelet: Blue rubber strap with functional one-click quick-release system
- Water Resistance: Stated 50m — we advise a professional pressure test before any water exposure. Keep the crowns untouched while the watch is underwater.
This reference is suited for collectors seeking a robust, sports-oriented mechanical piece that accurately replicates complex proprietary case and strap mechanisms.



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