In 2010 when Switzerland Schaffhausen IWC ushered in eighty-year anniversary of the Portuguese Series, IWC introduced a limited edition watch of 50 pieces all over the Globe (Asia 18 pieces), and only franchise houses sell the north-south moon phase perpetual calendar watches.
Portuguese Perpetual Calendar watch (Model: 5021) is allocated with the independent perpetual calendar, full show of the year and have the countdown to the next full moon and the moon phase display of northern and southern hemispheres. It showed an unprecedented accuracy of the month in the northern and southern hemispheres: only appears one-day deviation every 577 years.
Today, this launched limited edition watch is used the modern 44.2 mm case. There are some bright spots adding in the appearance of the watch: the unique gray rock in the watch dial, which is elegant and low-key; the case is improved from the 18K rose gold to the 18K red gold, which is adding more warm tones to the exterior; the small dial showing the power reserve is decorated with the eye-catching gradual red and blue indicate adjustment, which allow wearers to identify the current power reserve status of the watch.
It is with the IWC self-mastery movement, and matched with the Bühler Dayton automatic chain system and 7-day power reserve, perpetual calendar, moon phase calendar display, moon phase display of the northern and southern hemispheres, four-digit year display, small seconds stop valve device, Breguet hairspring , and the lump is decorated with 18K gold badge. It is the wonderful option if you are searching for a timepiece which is in the excellent performance and classic design. No wrong of choosing it!