The Richard Mille RM 52-01 Tourbillon Skull ref. RM 52-01 was introduced at Baselworld 2013 as the second piece in the Skull collection, a limited edition of 30 pieces. A skull sculpted in 5N red gold forms the movement's baseplate, framed by a black TZP ceramic bezel and caseback. Manual-winding tourbillon Calibre RM052, approx. 48-hour power reserve; Black TZP ceramic bezel and caseback, carbon nanotube caseband; Case 42.70 x 50.00 x 15.95 mm; Limited edition of 30 pieces; Black rubber strap. Full set. Maker: Richard Mille. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request. Case Size: 42.70 x 50.00 mm. Case Material: Black TZP ceramic and carbon nanotube. Movement: Manual — Calibre RM052. Dial: Skeletonized. Bracelet/Strap: Black rubber strap. Complications: Tourbillon.