Audemars Piguet Royal Oak 26231ST 37mm APS Factory

APS Factory Audemars Piguet Royal Oak 26231ST

The APS Factory Audemars Piguet Royal Oak 26231ST is one of the most requested builds in the Royal Oak line, and APS Factory has delivered it with the detail collectors actually inspect: correct case proportions, a properly finished dial and a bracelet that sits right on the wrist.

The result is a watch that photographs convincingly, wears comfortably and holds up to daily use, backed by our QC photo service and 12-month movement warranty.

What Makes It Stand Out

The Only True Mechanical Choice for the Midsize AP

For years, finding a first-rate midsize AP meant compromising. You either had to accept an overly thick case or settle for a battery-powered quartz movement with a ticking seconds hand. The APS 37mm Royal Oak completely changes the game. By engineering this timepiece around the dedicated Dandong 4801 mechanical movement, APS Factory has finally delivered a midsize high-end tribute that feels, sweeps, and operates exactly like a traditional Swiss mechanical instrument.

Flawless Case Geometry and The “End-Link” Secret

A high-end watch should wear elegantly, not like a stiff bangle. The APS 37mm Royal Oak has mastered wearability by introducing articulating (movable) end-links. Unlike lower-tier models where the metal links connecting to the rubber strap are rigidly fixed, the APS end-links pivot naturally. This allows the premium-tier elastomer rubber strap to drop straight down, contouring precisely to women’s wrists or men with wrists under 6.5 inches. Combined with the true-to-spec 12.4mm case thickness, the wrist presence is incredibly authentic.

Master-Class Tapisserie Dial Finishing

The face of the APS 37mm Royal Oak is a testament to aftermarket macro-manufacturing:

• Recessed Sub-dials: The three chronograph registers feature authentic concave depth, moving away from the cheap, flat-printed look.
• Correct Lume: The hands and hour markers are filled with the correct C3 yellowish-white luminous material, abandoning the harsh, stark white used by inferior factories.
• Octagonal Bezel: Meticulous chamfering along the bezel edges guarantees a soft, luxurious light reflection without sharp, unrefined corners.

Specifications

FAQ

Does the chronograph actually work, or are the sub-dials just for show?

Yes, the APS 37mm Royal Oak boasts a fully functional mechanical chronograph. The large central hand sweeps smoothly when activated, and the sub-dials accurately track elapsed time.

Will this watch fit a very small wrist (e.g., a woman’s wrist)?

Absolutely. Thanks to the size and the newly upgraded articulating (downward-pivoting) end-links, the rubber strap on the APS 37mm Royal Oak wraps tightly and comfortably around wrists as small as 5.5 inches without flaring out.

Is APS Factory Audemars Piguet Royal Oak 26231ST a quartz (battery) watch?

No. Unlike 90% of the midsize models on the market, this version uses a Dandong 4801 automatic mechanical movement. It winds via a rotor and boasts a smooth sweeping seconds hand.

How should I operate the chronograph to prevent damage?

To guarantee the longevity of your mechanical movement, always follow the proper sequence: press the top button to Start, press the top button again to Stop, and only then press the bottom button to Reset. Never reset the chronograph while it is running.