Richard Mille RM 055 Custom Carbon 49.9 × 42.7mm RMUL2 Manual-Winding Watch
A bold tonneau-shaped mechanical sports watch combining a fully skeletonized display with a lightweight black carbon fiber case and vivid red accents. Measuring 49.9 × 42.7mm, the watch delivers strong wrist presence while maintaining a performance-focused appearance inspired by modern motorsport engineering.
The openworked dial removes the traditional solid dial surface, allowing the barrel, gear train, bridges, and balance assembly to become the main visual elements. A black inner flange with red minute markings frames the mechanical structure, while luminous titanium-style hands provide essential readability against the complex background.
Exposed spline screws, a red crown protector, and a red rubber strap reinforce the architectural black-and-red design. At approximately 6 o’clock, the visible balance system adds constant mechanical motion, giving the watch a dynamic appearance both on and off the wrist.
Key Advantages
- Full skeleton construction creates a powerful mechanical visual impact
- Layered carbon texture gives the case a technical, lightweight character
- Free-sprung balance design supports stable regulation in active conditions
- High-contrast black-and-red styling stands out without excessive decoration
- Curved tonneau profile follows the wrist for a more integrated sports fit
- Visible movement components make the watch engaging from every angle
- Rubber strap suits casual, athletic, and motorsport-inspired outfits
- Ideal for customers who prefer modern engineering over traditional dress-watch styling
Technical Specifications
| Specification | Details |
|---|---|
| Brand and Series | Richard Mille RM 055 |
| Model | RM 055 |
| Watch Type | Tonneau-Shaped Skeleton Mechanical Sports Watch |
| Case Size | 49.9 × 42.7mm |
| Movement | Manual-Winding RMUL2 Movement |
| Balance System | Free-Sprung Balance Design |
| Dial | Fully Skeletonized Dial |
| Inner Flange | Black Inner Flange with Red Minute Scale |
| Hands | Skeletonized Luminous Titanium-Style Hands |
| Case Material | Black Carbon Fiber with Layered Texture |
| Case Shape | Tonneau |
| Crown Detail | Crown with Red Protective Surround |
| Strap | Red 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. |
| Core Design | Skeletonized free-sprung mechanical architecture enclosed within a black carbon fiber tonneau case |
FAQ
1. Is the skeleton dial difficult to read?
The exposed mechanism creates a more complex background than a conventional dial. The luminous central hands and red minute scale are designed to maintain basic readability, but this model prioritizes mechanical visual impact over minimalist legibility.
2. What is the benefit of a free-sprung balance?
A free-sprung system regulates timing through weights on the balance wheel rather than a traditional regulator index. This allows the hairspring to move more freely and can improve regulation stability under vibration when correctly assembled and adjusted.
3. Will the carbon fiber pattern look identical on every watch?
No. Layered carbon materials naturally show small variations in line direction, texture, and surface pattern. These differences are normal and give each case a slightly individual appearance.
4. Is the red rubber strap suitable for active wear?
Yes. Rubber is flexible, moisture-resistant, and easy to clean, making it suitable for casual and active use. The strap should still be rinsed and dried after exposure to sweat, salt water, or chemicals.
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