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Portugieser Perpetual Calendar 44

Automatic winding, Diameter 44.4 mm

Dune, 18 ct white gold Case

PRODUCT INFORMATION

  • Dune dial
  • Black alligator leather strap by Santoni Strap width 22.0 mm

DELIVERY & RETURNS INFORMATION

Limited Availability – contact us to learn about purchase options

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Portugieser Perpetual Calendar 44

IWC Schaffhausen’s perpetual calendar was originally developed during the 1980s by former head-watchmaker Kurt Klaus. In 2003, the legendary complication was presented in the Portugieser collection for the first time. Since then, the Portugieser Perpetual Calendar has been a major pillar of the collection.

Perpetual calendar | IWC Schaffhausen

In the early 1980s, IWC’s head-watchmaker Kurt Klaus set out on an engineering journey to translate the Gregorian calendar with its many irregularities into a mechanical program for a wristwatch. His ingenious perpetual calendar, which debuted in the Da Vinci Perpetual Calendar in 1985, comprises only about 80 parts and displays the date, day, month, year in four digits, and the moon phase. The smart mechanical program automatically recognises the different length of the months, and even adds a leap day at the end of February every four years. The moon phase display is so precise that it will deviate from the actual phase of the moon by just one day after 577.5 years. All displays are perfectly synchronised and can be adjusted simply by turning the crown. Some models come with an additional century slide, so the watch can continue showing the date until 2499. The calendar only needs a small adjustment in those centurial years that skip the leap year, which is the case in 2100, 2200, and 2300. Some versions of the calendar feature a double moon phase display, showing the moon phase on the northern and southern hemispheres.

'Case'
  • Features
  • Case
  • Movement
  • Packaging
  • 7 days power reserve
  • Perpetual calendar with displays for the date, day, month, year in four digits and perpetual moon phase
  • Rotor in 18-carat 5N gold
  • Small hacking seconds
  • Pellaton automatic winding
  • Power reserve display
  • Double box-glass sapphire crystals, antireflective coating on both sides
  • Case 18 ct white gold Case
  • Diameter 44.4 mm
  • Height 14.9 mm
  • Back case See-through sapphire glass back
  • Water resistance 5.0 bar
  • Calibre 52616 Calibre
  • Movement type Automatic winding
  • Power Reserve Indicator 168 hours power reserve
  • Frequency 28'800 VPH (4 Hz)
  • Components 385 Components
  • Jewels 54 Jewels

Contact Concierge

Do you have a question about a product, your order or our service? Contact us via phone, email, or through our Whatsapp service.