APS 37mm Royal Oak Chronograph (Mechanical Dandong 4801)

The Only True Mechanical Choice for the Midsize AP
For years, finding a high-quality 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 luxury tribute that feels, sweeps, and operates exactly like a traditional Swiss mechanical instrument.
Flawless Case Geometry & The “End-Link” Secret
A luxury 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 elastomer rubber strap to drop straight down, contouring perfectly 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 genuine 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 ensures a soft, luxurious light reflection without sharp, unrefined corners.

📊 Technical Specifications

Specification
Details

Model Reference
Ref. 26231ST

Manufacturer
APS Factory

Case Diameter
37.0 mm (Exact to OEM spec)

Case Thickness
12.4 mm (Exact to OEM spec)

Movement
Dandong 4801 Custom Mechanical Integrated Chronograph

Functions
Hours, Minutes, Running Seconds (at 6 o’clock), Chronograph

Dial
“Grande Tapisserie” pattern with recessed sub-dials

Crystal
Scratch-resistant Sapphire with AR coating

Strap Material
High-grade elastomer rubber with brushed deployant clasp

🤔  (FAQ)
Q: Does the chronograph actually work, or are the sub-dials just for show?
A: Yes, the APS 37mm Royal Oak features a fully functional mechanical chronograph. The large central hand sweeps smoothly when activated, and the sub-dials accurately track elapsed time.
Q: Will this watch fit a very small wrist (e.g., a woman’s wrist)?
A: 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.
Q: Is this a quartz (battery) watch?
A: 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 features a smooth sweeping seconds hand.
Q: How should I operate the chronograph to prevent damage?
A: To ensure 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.