Royal Oak 15510ST vs 26240ST
| 15510ST | 26240ST | |
|---|---|---|
| Functions | Hours, minutes, centre seconds, date | Flyback chronograph, hours, minutes, small seconds, date |
| Dial layout | Date window, no counters | Two chronograph counters and a small seconds |
| Case flank | Crown only | Crown between two chronograph pushers |
| Thickness | 10.5 mm | 12.4 mm |
| Calibre | 4302: 257 parts, 32 jewels | 4401: 381 parts, 40 jewels |
Both are 41 mm in steel, water resistant to 50 m, with about 70 hours of reserve, so the diameter does not settle it. Ask for the 15510ST if you want the plain dial and the thinner case; ask for the 26240ST if you want to measure elapsed time, with a flyback that resets and restarts the timing in one press.
See the 26240ST




