Richard Mille RM 027-01

RM 027-01 is a manual-winding tourbillon movement developed by Richard Mille and co-developed with Renaud & Papi. It weighs 3.5g, making the complete watch including strap just 19g, which made it the lightest tourbillon in the world at launch. The movement is designed to withstand shocks up to 5,000g, reflecting the extreme durability requirements set for its intended use in professional tennis. It was produced for the first generation Rafael Nadal watch and has since been discontinued.