IWC Romana Perpetual Calendar 2050 Platinum First introduced in 1994, the IWC Romana Perpetual Calendar 2050 was the thinnest perpetual calendar ever produced, with a total thickness of just 3.15mm. It represents a fascinating chapter in watchmaking history—both in the race to create the “world’s thinnest watch” and in IWC’s remarkable recovery after the quartz crisis. This is one of the very rare references crafted in platinum, with far fewer pieces produced compared to the 18K gold versions. As a descendant of the IWC Da Vinci—renowned for its groundbreaking IWC 79261 perpetual calendar movement designed by Kurt Klaus—the Romana Perpetual Calendar 2050 is a distilled interpretation, powered by a much slimmer evolution of the same caliber. According to the brand, it was during long walks with his dog that Klaus envisioned a new perpetual calendar module consisting of only 81 individual components, operating fully mechanically without requiring any calendar adjustment until the year 2499. The design is understated and elegant, with four subdials arranged clearly and intuitively across the dial. The dial measures just 36mm, featuring a slate-grey tone that pairs beautifully with the platinum case. To balance the inherent complexity of the display, the Roman hour numerals are positioned near the edge of the case, creating a more spacious and harmonious feel. This is truly a piece worth owning in any collection—especially for those who appreciate refined, elegant dress watches.