Full ceramic, full dive spec. The replica royal oak offshore 15720CN takes the 15720 Diver and builds it entirely in black ceramic — case, bezel, crown, everything. The result is a 300-meter dive watch that weighs noticeably less than its steel counterpart while being harder on every surface. Cal. 4308 inside, 60 hours of reserve, and the same inner rotating bezel system as the steel versions. This is the Offshore Diver for people who want the lightest possible package without giving up any capability.
Ceramic as a Dive Watch Material
Ceramic makes sense on a dive watch for specific reasons. It does not corrode in salt water. It does not pick up scratches from sand, rocks, or tank hardware. And it weighs roughly 30% less than steel, which is a genuine comfort factor during extended wear — whether that is a full day on a boat or a week of daily rotation.
The trade-off is brittleness. A ceramic case can crack on a sharp impact that would only dent steel. AP mitigates this with the case geometry — the octagonal bezel and the prominent case flanks distribute force away from flat surfaces where ceramic is weakest. For a watch that lives on a wrist rather than bouncing off door frames, ceramic is the superior material. The matte black finish does not show fingerprints and never needs polishing.
15720CN vs. Steel 15720ST
Side by side, the ceramic and steel 15720 divers share identical dimensions — 42mm by 14.1mm — and the same Cal. 4308 movement. The differences are weight, surface hardness, and visual character. The steel 15720ST in black catches light on its polished chamfers and brushed flats. The ceramic version absorbs light uniformly, creating a matte, stealth aesthetic that some people find more attractive and others find too flat.
The inner rotating dive bezel on this replica royal oak offshore 15720CN works identically to the steel version — crown at 10 o’clock, counter-clockwise only. The black Mega Tapisserie dial with luminous markers provides the same underwater readability. Check the full Offshore range for all available materials, or review shipping options for delivery details on ceramic models.
| Reference | 15720CN.OO.A002CA.01 |
| Case | 42mm · Black ceramic |
| Bezel | Black ceramic · 8 hexagonal screws |
| Dial | Black · Mega Tapisserie · Luminous markers |
| Crystal | Sapphire · AR coating |
| Caliber | 4308 · Automatic · 60h reserve |
| Strap | Black rubber · quick-change system |
| Buckle | Black ceramic · AP folding clasp |
| Water | 300m / 30 ATM |
| Functions | Hours, minutes, seconds, date, inner rotating bezel |
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