Audemars Piguet Royal Oak Offshore 26420IO.OO.A009CA.01 43mm Free-Sprung 4401 Movement Chronograph
A powerful 43mm automatic chronograph combining the bold architecture of the Royal Oak Offshore with a sophisticated grey-and-blue color scheme. The grey ceramic octagonal bezel, exposed polished hexagonal screws, substantial crown guards, and prominent chronograph pushers create a strong and technical sports-watch presence.
The textured grey dial is paired with three deep-blue chronograph subdials, applied luminous baton markers, and broad hands for clear reading. A tachymeter scale surrounds the dial for measuring average speed, while the angled date window between 4 and 5 o’clock is carefully integrated into the balanced three-counter layout.
Produced by APS Factory, this model is equipped with a customized replica-style 4401 integrated automatic chronograph movement featuring a free-sprung-style balance system. Weighing approximately 166.95g, it delivers a substantial yet balanced wrist presence together with a modern luxury-sport appearance.
Key Advantages
- Free-sprung-style balance distinguishes this upgraded 4401 movement version
- Integrated chronograph architecture supports balanced subdial spacing
- Grey ceramic bezel offers excellent resistance to everyday surface scratches
- Deep-blue counters create refined contrast against the grey textured dial
- Brushed surfaces and polished bevels emphasize the angular case construction
- Luminous markers and broad hands provide fast, clear time reading
- Approximate 166.95g weight delivers a solid luxury sports-watch feel
- Flexible grey rubber strap supports comfortable extended wear
Technical Specifications
| Specification | Details |
|---|---|
| Reference | 26420IO.OO.A009CA.01 |
| Factory | APS Factory |
| Watch Type | Luxury Automatic Mechanical Chronograph Sports Watch |
| Case Diameter | 43mm |
| Movement | Customized Replica-Style 4401 Integrated Automatic Chronograph Movement |
| Balance System | Free-Sprung-Style Regulator-Free Balance System |
| Approximate Weight | Approx. 166.95g; Individual Units May Vary Slightly |
| Dial | Grey Textured Geometric Dial |
| Subdials | Three Deep-Blue Chronograph Subdials |
| Hour Markers | Applied Luminous Baton Markers |
| Date Display | Angled Date Window Between 4 and 5 O’clock |
| Scale | Outer Tachymeter Scale |
| Case Material | 316L Stainless Steel |
| Bezel | Grey Octagonal Ceramic Bezel with Eight Polished Hexagonal Screws |
| Strap | Grey Rubber Strap |
| Crystal | Sapphire Crystal |
| Water Resistance | Suitable for everyday splashes only. Not suitable for swimming or showering. Please refer to our Water Resistance Care Guide. |
FAQ
1. What distinguishes this upgraded 4401 movement?
This version combines an integrated chronograph architecture with a free-sprung-style balance system. It offers more balanced subdial positioning, improved date-window alignment, and a cleaner regulator-free-style movement appearance.
2. What is the advantage of a free-sprung-style balance?
It uses weighted balance components instead of a conventional visible index regulator. The main advantage is a cleaner mechanical layout that helps customers identify this upgraded movement version.
3. How heavy is this watch?
The watch weighs approximately 166.95g, giving it a substantial and well-balanced sports-watch feel. Individual production units may vary slightly in weight.
4. Is the grey ceramic bezel suitable for daily wear?
Yes. Ceramic offers excellent resistance to everyday surface scratches. However, it can chip or crack after a severe impact and should be protected from drops and hard knocks.
5. Does the grey rubber strap feel comfortable?
Yes. The strap is flexible, moisture-resistant, and suitable for extended wear. It also complements the grey case and allows the deep-blue chronograph counters to remain the main visual highlight.








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