Richard Mille RM 052 Tourbillon Skull Ref. RM 052 The Richard Mille RM 052 Tourbillon Skull ref. RM 052, presented in 2012, builds its movement in the form of a skull: the baseplate and bridges are a grade 5 titanium skull, set above the tourbillon. This version is cased in titanium. - Manual-winding tourbillon Calibre RM052 - Grade 5 titanium skull-shaped baseplate and bridges - Titanium case - Black rubber strap Full set. Maker: Richard Mille. Year: 2012. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.