replica Richard Mille simple was the first to use titanium for the main structural components of a movement – the baseplate and bridges upon which all gears, trains, levers, and the escapement are mounted. In the caliber RMXP1, the titanium baseplate and bridges are first sandblasted, then hand-polished. The baseplate is coated in Titalyt®, a protective layer for titanium that increases hardness and improves corrosion resistance. The result is a smooth, matte finish, gray in color with hints of brown. This contrasts well with the black PVD coating (for increased corrosion resistance) on the brushed titanium bridges, which secure the gear train to the bottom plate. The contrast enhances the depth and dimensionality of the movement – particularly difficult to do with an ultra-thin movement. Well done.