Is your RM 055
the real deal?
The Richard Mille RM 055 "Bubba Watson" is a lightweight sports watch crafted from advanced materials like white ATZ ceramic and Carbon TPT. Designed for professional golfers to wear during competition, its combination of extreme lightness and six-figure pricing makes it one of the most counterfeited ultra-luxury watches in the world. Here's how to tell the real thing.
How to authenticate an RM 055
Tonneau Case in ATZ Ceramic / Carbon TPT
The RM 055 features Richard Mille's signature tonneau-shaped case, available in white ATZ ceramic or Carbon TPT. ATZ ceramic has a distinctive smooth, matte white finish that is extremely hard and scratch-resistant, weighing approximately half as much as steel. Carbon TPT displays unique layered striations from stacking hundreds of carbon fiber sheets at specific angles — no two cases are identical. Counterfeits use standard ceramic or painted metal that feels noticeably heavier, and their Carbon TPT patterns look too uniform or printed rather than organic.
Skeletonized Movement (RMUL2)
The RM 055 houses the RMUL2 manual-winding caliber, visible through both the skeletonized dial and the transparent case back. The movement features a grade 5 titanium baseplate and bridges with extensive hand-finishing including beveled edges, circular graining, and polished screw heads. Each component should appear precisely machined with visible depth and dimension. Counterfeits either show a printed skeleton pattern on a flat surface, or if the movement is visible, it displays rough, unfinished components without proper Richard Mille-level decoration and architecture.
Crown with RM Logo
The crown features the "RM" logo precisely engraved on its surface. It should operate smoothly with a firm, satisfying feel when turned. The RM 055 includes a function selector near the crown with positions for Winding (W), Neutral (N), and Hand-setting (H). The selector should click crisply between positions and actually change the crown's function — in the N position, the crown spins freely without engaging the movement. Counterfeits have poorly engraved or blank crowns with non-functional selectors that don't actually change the crown behavior.
Titanium Spline Screws
The RM 055 case back is secured by grade 5 titanium spline-drive screws — a specific type of fastener that requires a specialized tool to remove. These screws should be perfectly uniform in size, evenly torqued, and seated flush with the case surface. Each screw head features a distinctive multi-point spline pattern rather than standard Phillips or flathead slots. The titanium material gives them a specific matte grey appearance. Counterfeits use standard stainless steel screws with Phillips, flathead, or hex drives instead of genuine spline-drive fasteners, and the screws often vary in size or sit at uneven depths.
Case Back Markings and Serial Number
The case back features precise engravings including the model reference "RM 055," a unique serial number, "Richard Mille" branding, and technical specifications. On genuine watches, these engravings are deeply and cleanly cut with consistent character spacing and depth. The serial number follows Richard Mille's specific format and should match the accompanying documentation. Counterfeits have shallow, poorly formed engravings with inconsistent spacing, wrong fonts, or serial numbers that don't correspond to Richard Mille's production records.
Rubber Crown O-Ring and Strap
The RM 055 features a high-quality rubber strap with a specific texture and flexibility, designed for comfort during athletic activity. The crown area includes a rubber O-ring gasket that provides water resistance and a tactile seal when the crown is pushed in. The strap should feel supple yet firm, with clean edges, precise buckle attachment, and the Richard Mille logo properly embossed on the clasp. Counterfeits use cheap rubber that feels rigid or overly soft, with rough edges, poor embossing, and an O-ring that doesn't create a proper seal.
RM 055 counterfeit warning signs
Wrong Case Material and Weight
The RM 055 in ATZ ceramic is remarkably lightweight — the entire watch weighs under 70 grams with the strap. If the watch feels heavy or dense on the wrist, it likely uses standard ceramic, painted metal, or stainless steel instead of genuine ATZ. A simple weight comparison against the official specification (approximately 49g for the case alone in ceramic) can immediately reveal a counterfeit. Carbon TPT versions should also feel distinctly lighter than steel equivalents.
Poor Skeletonization and Movement Finishing
The RMUL2 movement should display extensive hand-finishing visible through the skeleton openings. If the movement components appear rough, undecorated, or lack beveled edges and proper graining, the watch is counterfeit. Many fakes use a cheap automatic movement rather than the correct manual-winding RMUL2, which is immediately identifiable by the presence of a rotor (the genuine RM 055 has no rotor since it is manual-winding).
Cheap Standard Screws
Genuine RM 055 watches use grade 5 titanium spline-drive screws that require a specialized tool. If the case back screws are standard Phillips, flathead, or hex-drive types, the watch is immediately identifiable as counterfeit. Also check that all screws are uniform in size, material, and seating depth — genuine Richard Mille quality control ensures perfect consistency across every fastener.
Incorrect Serial Number Format
Richard Mille serial numbers follow a specific format and sequence that corresponds to their production records. If the serial number engraving appears shallow, uses inconsistent character spacing, or the format doesn't match Richard Mille conventions, the watch is not genuine. Always cross-reference the serial number with the warranty card and certificate of authenticity — on genuine watches, all three must match perfectly. Contact an authorized Richard Mille boutique for verification.
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Frequently asked questions
What is ATZ ceramic?
ATZ stands for Alumina Toughened Zirconia, an advanced technical ceramic used by Richard Mille for the RM 055 case. It is created by combining alumina and zirconia oxides and sintering them at over 1,500 degrees Celsius. The result is a material approximately 1,200 Vickers in hardness, highly scratch-resistant, and roughly half the weight of steel. The white ATZ ceramic has a distinctive smooth, matte finish with a slightly warm tone. It is also biocompatible and hypoallergenic, making it ideal for sport watches worn directly against the skin during athletic activity.
What movement powers the RM 055?
The RM 055 is powered by the RMUL2 caliber, a manual-winding skeletonized movement developed with Swiss movement manufacturer Vaucher. It operates at 28,800 vibrations per hour (4 Hz) with approximately 55 hours of power reserve. The movement features a grade 5 titanium baseplate and bridges for reduced weight, displays hours, minutes, and includes a function selector (Winding, Neutral, Hand-setting). The RMUL2 is designed to withstand shocks up to 5,000 Gs. Since it is manual-winding, there is no rotor — a key detail that distinguishes it from counterfeits that often use cheap automatic movements with a visible rotor.
How can I verify a Richard Mille serial number?
Richard Mille serial numbers are engraved on the case back and follow a specific format including the model reference and a unique production number. The most reliable verification method is to contact Richard Mille directly through an authorized boutique or the brand's customer service, who can confirm whether the serial matches their production records. The serial on the case back must also match the number on the warranty card and certificate of authenticity. On genuine watches, the engraving is deep and precise with consistent character spacing. Counterfeits typically show shallow, poorly formed serials with irregular spacing.