IWC Portugieser Chronograph Watch - 41.0 mm 5N Gold Case - Slate Dial - Black Alligator Strap - IW371610 Sunburst 40mm Everose Rolesor case with

40mm Everose Rolesor case with Oystersteel monobloc middle case

caliber 324 S Q self-winding movement with day

caliber E15 quartz movement

polished bezel

Case material: Platinum

IWC Portugieser Chronograph Watch - 41.0 mm 5N Gold Case - Slate Dial - Black Alligator Strap - IW371610 Sunburst 40mm Everose Rolesor case with41. 0 mm 18K 5N gold case, 13. 0 mm thick, see through sapphire glass back, convex sapphire glass crystal with antireflective coating on both sides, slate coloured dial, calibre 69355 automatic movement with chronograph, column wheel, hours, minutes, small seconds, approximately 46 hours of power reserve, black alligator leather strap by santoni. Water resistant to 3 bar.