The IWC Portugieser Perpetual Calendar Tourbillon IW504509 features a platinum case and a deep purple dial; powered by the 51950 calibre, it combines a flying minute tourbillon with a perpetual calendar. Buy IWC Portugieser clone watches online, buy replica watches at twatchclone.
The watch measures 45 mm in diameter and 15.3 mm in thickness. Its case is crafted from platinum—an exceptionally rare and pure precious metal prized for its outstanding durability and distinctive silvery-white luster. It features a sapphire crystal with anti-reflective coating on both sides and a transparent case back, offering water resistance to 3 bar (approximately 30 meters)—sufficient for daily wear.
The deep purple dial, finished with a striking sunray pattern, commands attention. Rhodium-plated leaf-shaped hands and hand-applied Arabic numerals work in concert with a railway-track minute scale to display the time. Sub-dials at 3, 6, and 9 o'clock display the date (incorporating a power reserve indicator), the month and moon phase, and the day of the week, respectively; additionally, a four-digit year display window is positioned between 7 and 8 o'clock.
The perpetual calendar mechanism powering the IWC Portugieser Perpetual Calendar Tourbillon IW504509 was developed in the 1980s by legendary watchmaker Kurt Klaus. It mechanically recognizes the varying lengths of months and automatically adds a day at the end of February during leap years, which occur every four years. All displays are precisely synchronized and can be adjusted simply by turning the crown; the moon phase display is exceptionally accurate, deviating by only one day over the course of 577.5 years.
The flying minute tourbillon at 12 o'clock comprises 82 components and weighs a mere 0.635 grams, representing one of the most challenging assemblies to construct and calibrate in watchmaking. The pallet fork and escape wheel are housed within a small carriage that rotates once per minute around its own axis; this counteracts the effects of gravity on the oscillating system to enhance timekeeping precision while creating a captivating visual spectacle.
