The RM 25-01: This is what happens when Sylvester Stallone helps design a high-end watch

According to Richard Mille, the company's engineers spent months working on getting the technical side of the RM 25-01 right By using titanium parts, they were able to reduce the 35-jewel, 21,600 vph, manually-wound movement's weight and cut energy consumption by half The Glucydur balance wheel, stainless-steel barrel shaft, and 1230 mm tourbillon are visible front and reverse inside the high skeletonized design. Source