IWC Portofino Hand-Wound Tourbillon Retrograde Watch - 45.0 mm 5N Gold Case - Silver Dial - Dark Brown Alligator Strap - IW516501 Submersible The renowned Caliber 1055 with

The renowned Caliber 1055 with 21 Jewels

The signature GMT-Master II functionality

a pinnacle of precision and reliability

it is a symbol of prestige

it's an enduring symbol of your discerning taste and appreciation for unparalleled craftsmanship

IWC Portofino Hand-Wound Tourbillon Retrograde Watch - 45.0 mm 5N Gold Case - Silver Dial - Dark Brown Alligator Strap - IW516501 Submersible The renowned Caliber 1055 with45. 0 mm 18K 5N gold case, 14. 1 mm thick, see through sapphire glass back, arched edge sapphire glass crystal with antireflective coating on both sides, silver plated dial, calibre 59900 movement with date, hours, minutes, power reserve indicator, tourbillon escapement, approximately 192 hours of power reserve, dark brown alligator leather strap by santoni. Water resistant to 3 bar.