Portuguese Perpetual Calendar is developed by IWC and is amazingly precise. As it is known to us, moon moves around the earth in about 2.8 seconds, 44 minutes, 12 hours, 29 days. In the last middle 1980s, Kurt Klaus, the great legend designers in IWC, successfully developed the watches with perpetual calendar, and it will create 1 day different only after 122 years. No other watches can surpass its precision until the 5000 big movement come to exist. Thanks to the moon phase tourbillon, moon phase can be precise as that.
Portuguese Perpetual Calendar is fitted with the exclusive moon phase display that could precisely display the moon phase from the north hemisphere to the south hemisphere. In the new Portuguese Perpetual Calendar, designers introduced the starring night to replace the final countdown dial. Another big change is the minute track introduction which make Portuguese Perpetual Calendar more close to the original edition. what’s more, the date and week display adopts the same color so that the whole dial looks harmonious. As to the Ref.5033, there is just a slight adjustment, but the new dome edge reduces the thickness of the watch, visually.
Ref.5033 and Ref.5034 are both fitted with IWC 52000 home-made movement and could works properly for 7 days, offering long energy support for its 9 complication. The movement is equipped with Pellaton winding system that can works at a high efficiency. Through the blue sapphire mirror, you are able to appreciate the sophistication of Ref.5033. Ref.5033 has two different editions: the 18k white gold edition with plain color; an 18k rose gold edition with silver-coated dial. Ref.5034, fitting with the same 18k white gold, Ref.IW503401, but it has blue color on the dial while the 18k rose gold has the plain color on the dial. The single moon phase and the double moon phase perpetual calendar watch have delicate Santoni alligator skin belt.