Richard Mille RM 55 Ceramics Tourbillon White Strap

RM 55 execution is defined by skeleton depth, case-corner geometry, crystal clarity, and the way the rubber strap sits flush against the case. Brushed, polished, coated, ceramic, carbon, crystal, and composite surfaces can show small production variation, which should be judged from the actual QC set. Crown resistance, rotor sound, bracelet articulation, strap stiffness, clasp tension, and setting feel may differ slightly between individual watches. Any stated water-resistance figure is a factory rating, not a promise for swimming or immersion; independent pressure testing is recommended before water exposure.