With the Portugieser Perpetual Calendar Tourbillon Edition “150 Years”, IWC combines the legendary perpetual calendar created by Kurt Klaus with a tourbillon on the dial for the first time. This masterpiece of watchmaking is available in a limited edition of 50 watches. It has an 18K red gold case, a white dial with a lacquered finish, and blued hands. To make the tourbillon visible at 12 o’clock, the designers opened up the calendar advance ring and integrated the moon phase in the month display at 6 o’clock.