IWC Portugieser Tourbillon Mystere Retrograde Watch - 44.2 mm Platinum Case - Silver Dial - Black Alligator Strap - IW504601 Brown burgundy alligator leather strap by

burgundy alligator leather strap by santoni with quick-change system

silver-toned dial with “Grande Tapisserie” pattern

slate-grey dial

black ceramic pushpieces and screw-locked crown

IWC Portugieser Tourbillon Mystere Retrograde Watch - 44.2 mm Platinum Case - Silver Dial - Black Alligator Strap - IW504601 Brown burgundy alligator leather strap by44. 2 mm platinum case, 15. 3 mm thick, sapphire back, sapphire crystal with arched edge, antireflective coating on both sides, silver plated dial, caliber 51900 pellaton automatic winding movement with power reserve display, retrograde date display, flying minute tourbillon, approximately 7 day of power reserve, black alligator leather strap by Santoni. Water resistant to 3 bar.