IWC - Portuguese Tourbillon Hand-Wound Watch IW546301

43 mm 18K white gold case, 11 mm thick, sapphire back, 18K white gold bezel, convex sapphire crystal with arched edge, antireflective coating on both sides, grey dial, calibre 98900 hand-wound movement with flying minute tourbillon consisting of 64 individual parts at 9 o’clock and small seconds at 6 o’clock , approximately 54 hours of power reserve, dark brown alligator leather strap, folding clasp buckle. Water resistant to 3 bar.