Royal Oak 26129 Chronograph Pink Gold / Brown

In Context

At 39 mm it sits just under the modern norm — the band that suits the widest spread of wrists. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. 50 m covers rain and hand-washing comfortably; it is not a watch to swim in.

The movement winds itself from the motion of your wrist. 40 hours of reserve carries it overnight, but not through a weekend in a drawer. At 21,600 vph the seconds hand advances 6 times a second, the slower and more audible rate of an older design.

26129OR.ZZ.D080CA.01 stands on its own in this catalogue — no other reference here shares its base number. It pairs a brown dial with a pink gold case. Beyond the time it carries a chronograph.

The 2385 is the Royal Oak Chronograph's movement from 1997 to 2021: an integrated column-wheel chronograph on the Frédéric Piguet 1185 base. It powers 120 watches in this library. The 1185 is one of the thinnest automatic chronographs ever made, at 5.5 mm, with a column wheel and a vertical clutch in a 26.2 mm diameter, and it is what allowed a chronograph to sit in a Royal Oak case without spoiling the proportions. Audemars Piguet's version runs at 21,600 vph with a 40-hour reserve and 37 jewels, with a date at 4 o'clock and the small counters that give the Royal Oak Chronograph its face. The in-house [4401](/calibers/audemars-piguet-ap-4401) replaced it in 2021. In the library it sits under 77 [Royal Oak](/brands/audemars-piguet/royal-oak) chronographs, the 39 mm 25860 and 26300, the 41 mm 26320 of 2012 and the 38 mm 26315, 41 [Royal Oak Offshore](/brands/audemars-piguet/royal-oak-offshore) references in the 37 mm ladies' case and 2 Millenarys. The 37 mm case accounts for 40 references, the 41 mm for 34 and the 39 mm for 28. 33 are limited editions. The [3126/3840](/calibers/audemars-piguet-ap-3126-3840) is the modular chronograph the larger Offshores used over the same years, and the glossary defines the [chronograph](/glossary/chronograph).

119 other watches in the library run the Audemars Piguet AP 2385.

Audemars Piguet

Royal Oak Chronograph 41 Platinum / One Night for One Drop

26338PT.OO.1220PT.01 · 41 mm

Audemars Piguet

Royal Oak OffShore Lady 26234 Two Tone Bucherer

26234SR.ZZ.D202CR.01 · 37 mm

Audemars Piguet

Royal Oak 26111 Chronograph Montreux Grand Prix 2006

26111.ST.OO.1110.ST.01 · 39 mm

Audemars Piguet

Royal Oak Chronograph 41 Platinum / The Hour Glass

26332PT.OO.1220PT.02 · 41 mm