The replica royal oak 26240BA polished is a chronograph in full 18K yellow gold with a traditional polished finish. Where frosted (.GG) references scatter light across a textured surface, the .OO polished version reflects it cleanly — mirror-like on flat surfaces, softer on curved edges. The Cal. 4401 inside is AP’s integrated flyback chronograph, running at 28,800 vph with a 70-hour reserve. Yellow gold chronographs in the Royal Oak line have always been uncommon, and this reference is the current-generation version of that tradition.
Polished vs Frosted Yellow Gold
AP currently produces the 26240BA in both polished (.OO) and frosted (.GG) finishes. The distinction matters more than it sounds. Polished yellow gold has a traditional, almost vintage presence — think 1980s and 1990s AP references where mirror finishes were standard. The frosted version introduces the Carolina Bucci hammered texture, which breaks up reflections into scattered micro-points of light.
On yellow gold specifically, the difference is more pronounced than on rose or white. Yellow gold polished surfaces pick up surrounding colours aggressively — green from foliage, blue from sky, warm tones from skin. The frosted finish mutes all of that. This replica royal oak 26240BA polished is the classic approach. See the frosted 26240BA side by side to decide which finish suits your preference.
Flyback Chronograph Cal. 4401
The 4401 is AP’s in-house integrated chronograph caliber, meaning the chrono module is built into the base movement rather than stacked on top. The practical result is a thinner profile — 12.4mm total case thickness for a chronograph is competitive. Flyback means you can reset and restart the chronograph with a single pusher press at 4 o’clock, skipping the stop-reset-start sequence.
At 40 jewels and 70 hours of power reserve, the 4401 is a modern movement with column wheel switching and vertical clutch engagement. The sub-dials sit at 6 (running seconds) and 9 (30-minute counter), keeping the layout symmetrical on the dial. Browse all available Royal Oak references or review our warranty terms for details on coverage.
| Reference | 26240BA.OO.1320BA.02 |
| Case | 41mm · 18K yellow gold · polished |
| Bezel | Octagonal · 8 hexagonal screws |
| Dial | Yellow gold tone · Grande Tapisserie |
| Crystal | Sapphire · AR coating |
| Caliber | 4401 · flyback chronograph · 40 jewels · 70h reserve |
| Bracelet | 18K yellow gold · polished · integrated |
| Buckle | 18K yellow gold · AP folding clasp |
| Water | 50m / 5 ATM |
| Functions | Hours, minutes, seconds, flyback chronograph, date |
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