IWC Portugieser - Perpetual Calendar - Tourbillon - Platinum - 46 MM - Black Dial - IW504101

The dial of this exceptional timepiece, reminiscent of the classic Portugieser style, showcases a constant-force tourbillon alongside indicators for the impressive 96-hour power reserve and sidereal time. Sidereal time, crucial for locating specific stars consistently, ensures that the same celestial bodies appear in the same position each night. On the reverse side lies a remarkable astronomical module, meticulously crafted to cater to the owner's preferences. Featuring over 500 stars and constellations with remarkable detail, this rotating night-sky disc would captivate any astronomer with its precision. The watch further provides data on sunrise and sunset times, sidereal time, and a perpetual calendar with leap years, accounting for daylight saving time adjustments. Given the meticulous craftsmanship and the extensive customization options, only a limited number of these extraordinary timepieces are meticulously crafted each year.