IWC Portugieser Perpetual Calendar

About This Watch

The IWC Portugieser Perpetual Calendar IW503406 is one of the most impressive grand complications available at its price point. Housing the in-house caliber 52615 with a remarkable 7-day power reserve courtesy of twin barrels, this watch displays the day, date, month, year in four digits, and a double moonphase indicator that requires correction only once every 577.5 years. The perpetual calendar mechanism automatically accounts for months of varying lengths and leap years, requiring no adjustment until the year 2100. The 44.2mm case provides ample real estate for the four subdials, each executed with precision and clarity — day and month at 12, date at 3, year and power reserve at 9, and the exquisite double moon phase at 6. The blue dial treatment adds a layer of contemporary sophistication to what is fundamentally a traditional haute horlogerie complication. The Pellaton automatic winding system ensures that the 168-hour power reserve is efficiently maintained with normal wrist wear. Despite its complexity, the watch remains remarkably wearable, and the perpetual calendar can be set using the crown alone — a user-friendly feature that distinguishes IWC's approach. This is a serious collector's timepiece that competes with offerings costing two to three times as much.