Savoir-faire RM 55-01 Manual Winding — RICHARD MILLE

The new RM 55-01 calibre, the RMUL4, is built on a grade 5 titanium baseplate., an alloy borrowed from the aerospace industry and highly prized at Richard Mille. To enhance its aesthetics, the baseplate is microblasted, sanded and treated with a black PVD coating. The going train is affixed by three bridges also produced from grade 5 titanium sanded and treated with Titalyt®. Nonetheless, working with this material remains a constant challenge. Milling grade 5 titanium is a herculean task: its extreme hardness and the brand’s low tolerance for error take a toll on every tool.