Richard Mille - RM055 Custom Made Free Sprung Black CER/RU Silv/Blk Skeleton ZGF RMUL2

ZGF Custom Made RM055 with Free Sprung Titanium RMUL2 Super Clone (Black Ceramic)

Richard Mille RM055 Black Ceramic NTPT Case Set – Overview

The Richard Mille RM055 Bubba Watson model has become one of the most sought‑after pieces in the lightweight sports‑luxury segment. The RM055 Black Ceramic NTPT variant pairs a monobloc black TZP ceramic bezel and caseback with a Carbon NTPT® mid‑case, showcasing an ultra‑skeletonized movement suspended within. This combination delivers exceptional durability, lightness, and the unmistakable Richard Mille aesthetic.

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Technical Specifications

• Case Size: 49.90 mm × 42.70 mm × 13.05 mm

• Bezel: Black TZP ceramic

• Caseband: Carbon NTPT® (North Thin Ply Technology)

• Caseback: Black TZP ceramic

• Movement: Caliber RMUL2, manual winding, skeletonized

• Power Reserve: Approximately 55 hours

• Water Resistance: 30 meters

• Functions: Hours, minutes, seconds

• Strap: Rubber with titanium folding clasp

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Case and Materials

The bezel and caseback are crafted from TZP ceramic (tetragonal zirconia polycrystal), a high‑tech material renowned for its scratch resistance and corrosion resistance. A matte finish minimizes reflections and smudging. The mid‑case uses Carbon NTPT®, which layers 30‑micron carbon fibres at alternating 45° angles, then infuses them with resin under high pressure, producing a unique marbled pattern on every watch.

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Movement

Caliber RMUL2 is an in‑house, manual‑winding, skeletonized movement. Its baseplate and bridges are made of grade 5 titanium, treated with black PVD and Titalyt coatings for enhanced hardness and corrosion protection. The movement is tested to withstand shocks up to 5,000 g and is suspended within the case by four dedicated shock absorbers. Finishing touches include hand‑polished bevels, micro‑blasted surfaces, satin‑finished gears, and polished pivots.

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Aesthetics and Wearability

Without a traditional dial plate, the RM055 allows you to read the time directly from the flange and movement bridges. White‑filled hands and hour markers stand out clearly against the dark, open‑worked backdrop. Despite its substantial dimensions, the tonneau‑shaped case contours comfortably to the wrist, and its composite construction keeps it surprisingly light for all‑day wear.

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Pros and Cons

Pros

• Cutting‑edge materials (TZP ceramic and Carbon NTPT®)

• Exceptional shock resistance for mechanical watches

• Distinctive skeletonized design

• Lightweight despite large case dimensions

Cons

• Water resistance limited to 30 m, unsuitable for swimming

• Extremely high cost and limited availability (market prices start around USD 400,000)

• Bold, technical styling may not suit every taste

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The Richard Mille RM055 Black Ceramic NTPT Case Set is a landmark in modern watchmaking, blending advanced materials from aerospace and motorsport with a refined, ultra‑skeletonized movement engineered for extreme durability. Its bold design makes it an unmistakable statement piece. For collectors who value pioneering engineering and have a matching budget, the RM055 remains one of the definitive luxury sports watches.