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Portofino Perpetual Calendar

Automatic winding, Diameter 40.0 mm

Silver plated, 18 ct 5N gold Case

PRODUCT INFORMATION

  • Silver plated dial
  • Blue calfskin strap Strap width 20.0 mm

DELIVERY & RETURNS INFORMATION

Delivery options depend on your shipping address. Our Ambassadors from the Concierge Service will be able to advise you accordingly. Free delivery and return

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Portofino Perpetual Calendar

The Portofino Perpetual Calendar features the legendary perpetual calendar developed by Kurt Klaus during the 1980s.

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
  • Central hacking seconds
  • Pellaton automatic winding
  • Sapphire glass, convex, antireflective coating on both sides
  • Perpetual calendar with displays for the date, day, month, leap year and perpetual moon phase
  • Case 18 ct 5N gold Case
  • Diameter 40.0 mm
  • Height 12.7 mm
  • Back case See-through sapphire glass back
  • Water resistance 5.0 bar
  • Calibre 82650 Calibre
  • Movement type Automatic winding, IWC-manufactured movement
  • Power Reserve Indicator 60 hours power reserve
  • Frequency 28'800 VPH (4 Hz)
  • Components 303 Components
  • Jewels 46 Jewels
  • Finishing Côtes de Genève

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.