Built around a transparent sapphire-cased tonneau body with a black bezel surround, this replica richard-mille transparent take on the RM 055 reference strips the watch down to pure structure. The see-through case lets you observe the movement from virtually every angle, not just through a traditional caseback window. A black bezel frames the transparency, adding contrast that defines the case edges and prevents the watch from visually disappearing on the wrist. The RM 055 reference has always been one of the more architecturally extreme pieces in the range, and this glass-cased interpretation pushes that further.

Key Specifications

• Case material: transparent sapphire crystal body
• Bezel: black composite surround
• Crystal: integrated sapphire (case is the crystal)
• Dial: fully skeletonized, visible from all sides
• Movement: automatic, visible through case
• Strap: black rubber with pin buckle

Sapphire crystal cases are among the most technically demanding constructions in watchmaking because the material is extremely hard but also brittle. Machining a tonneau shape from sapphire requires diamond-tipped tooling and slow cutting speeds.

Design & Finishing

The transparent case transforms the movement into the primary design element. Every plate, screw, and gear train component becomes visible, which means finishing quality cannot hide behind opaque walls. Richard Mille references with sapphire cases represent the top tier of the brand’s material exploration. The black bezel creates a frame effect, similar to how a dark matte surrounds a photograph. For a contrasting approach to the RM aesthetic, look at the 07-01 White Ceramic, which uses opacity and precious accents rather than transparency. The broader RM catalog spans both extremes, from fully set pavé to fully transparent sapphire.

On the Wrist

Transparent watches on the wrist create an unusual optical effect where your skin tone becomes part of the watch’s visible palette. The black bezel anchors the piece against this background, preventing it from looking fragile or undefined. Natural light passing through the case illuminates the movement differently throughout the day. This replica richard-mille transparent version of the RM 055 offers the most unobstructed view of mechanical architecture available in the current tonneau format.