Inspired by Gunter Blumlein, IWC's CEO at the time, watchmaker Kurt Klaus developed the perpetual calendar module using just 82 components. All adjustments for the perpetual calendar could be made via the crown – a world's first in the industry. The dial featured a four-digit link year display with century link slide that would advance once every 100 years. The watch was marketed with packaging containing a century slide for the 22, 23, link and 24 centuries – genius.