IWC Portugieser Tourbillon Regulator IW544603 White Dial Watch, 18K White Gold Case, Anti-Glare Sapphire Crystal Glass Mirror, White Radiant Dial with a Sword-Shaped Large Long Minute Needle in the Center. The 6 o’clock position is 60 seconds. The tourbillon flying in the air at 9 o’clock can offset the negative influence of gravity on the balance wheel, thus effectively offsetting the deviation of the travel rate, which is extremely accurate. IWC Portugieser Tourbillon Regulator IW544603 YL Factory White Dial Replica Watch. The 81-part tourbillon device is placed in a small dish at 12 o’clock. The rhodium-plated escapement wheel and the nickel-silver stationary wheel splint are all painstakingly cut by hand. Each fine part is polished with exquisite skills, including a large number of polished inner corners and bevels, and the details can be comparable to the authentic ones. Swiss tourbillon automatic movement, power storage 54 hours. Black alligator leather strap with white gold pin clasp engraved with IWC logo.