sapphire crystal with interior and exterior anti-reflective treatment
black structured and lined strap
polished stainless steel bezel set with 36 blue sapphires with 6 h-shaped titanium screws
satin-finished black ceramic bezel and anodized yellow composite resin lower bezel with 6 H-shaped black PVD titanium screws
18-carat white gold bezel set with baguette-cut sapphires
IWC Portugieser Tourbillon Mystere Retrograde Watch - 44.2 mm Red Gold Case - Ardoise Dial - Dark Brown Alligator Strap - IW504602 Big Bang sapphire crystal with interior and44. 2 mm 18K red gold case, 15. 3 mm thick, sapphire back, sapphire crystal with arched edge, antireflective coating on both sides, ardoise dial, caliber 51900 pellaton automatic winding movement with power reserve display, retrograde date display, flying minute tourbillon, approximately 7 day of power reserve, dark brown alligator leather strap by Santoni. Water resistant to 3 bar.