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Portugieser Perpetual Calendar 44

Automatic winding, Diameter 44.4 mm

Silver plated, 18 ct Armor Gold® case

PRODUCT INFORMATION

  • Silver plated dial
  • Dark brown alligator leather strap by Santoni Strap width 22.0 mm

DELIVERY & RETURNS INFORMATION

Standard delivery: delivery within 3-5 business days Free delivery and return

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

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