IWC 18K White Gold Portuguese Perpetual Calendar / IW502218

This Portuguese Perpetual Calendar has just about everything you could possibly wish for: a perpetual calendar, a perpetual moon phase display, a window showing the year in four digits, a seven-day automatic movement with Pellaton automatic winding, and a power reserve display. The view of the lunar phases is reminiscent of classical representations of the moon, whose waxing and waning is due to the presence of two semi-circles. This is the method chosen by watchmakers over the centuries to depict the “celestial arena” in gold. In view of the extra space available in the large movement, the moon phase wheels in the IWC perpetual calendar now have more teeth, making the mechanism one of the most accurate available. After 577 years, the deviation from the moon’s actual progress will be just one day. It is a modern and elegant timepiece that can hardly be bettered. 

The functional IWC Portuguese Perpetual Calendar II Model  (IW5022-18) features a full Perpetual Calendar in a new smaller size. This men's watch in a 42.3-mm 18K white gold case with a transparent case back and fixed bezel also comes in an 18K white gold fluted crown, and black crocodile leather strap with an 18K white gold deployant clasp. 

An anti-reflective, scratch-resistant sapphire crystal protects the IWC Portuguese Perpetual Calendar II 502218 which showcases a Grey anthracite dial with white gold hands and applied Arabic numeral hour markers, year display between 7 and 8 o'clock positions, and four sub-dials -- power reserve indicator and date display at 3 o'clock position, month display at 6 o'clock position, day indicator and seconds sub-dial at 9 o'clock position and moon phase at 12 o'clock position. 

The IWC Portuguese Perpetual Calendar II 502218 is utilized by mechanical movement using an automatic Pellaton winding system with a 7-day power reserve when fully wound. This fabulous timepiece is water-resistant to 30 meters (100 feet).  Box & Cert Dated NOV 2007.