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Portuguese Perpetual Calendar Hover or Tap to Zoom

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Specifications i
The following are common watch specifications and their definitions:
  • Model Number- Consists of a combination of letters and/or numbers that are found on the back cover of a watch
  • Collection- Watch family name
  • Circa- Year watch was made
  • Case Thickness- Width between the case back and the top of the crystal
  • Bezel Type- Indicates whether the bezel is functional or purely aesthetic
  • Movement- The internal mechanism of a watch (either Manual, Automatic, or Quartz)
  • Water Resistance- The amount of pressure a watch can endure (typically underwater)

  • Manufacturer's Reference # IW503202
  • Collection: Portuguese
  • Gender: Men's
  • Case Shape: Round
  • Case Size: 44 mm diameter
  • Case Thickness: 15.5 mm
  • Case Material: Rose/Red/Pink Gold
  • Crystal: Sapphire
  • Dial Color: Black
  • Dial Markers: Arabic
  • Movement: Automatic
  • Movement Caliber: 51614
  • Water Resistance: 30 meters
  • Strap/Bracelet: Strap - Deployant
  • Strap/Bracelet Material: Alligator/Crocodile
  • Features: Annual Calendar, Date, Day, Month, Moon Phase, Perpetual Calendar, Power Reserve, Second Hand
  • Manufacturer Warranty: 2 years


Aside from the date, day, month and year in four digits, the Portuguese Perpetual Calendar also indicates the number of days remaining until the next full moon. The display showing its course and featuring mirror images of the moon in the northern and southern hemispheres deviates from the moon's actual progress by just 12 seconds in one lunar period. The moon phase displays used in the Da Vinci Perpetual Calendar Edition Kurt Klaus are astonishingly accurate and deviate by just one day, after 122 years. The Portuguese Perpetual Calendar is even more precise. Larger moon phase wheels with different numbers of teeth reduce the deviation so drastically that a future inheritor of this watch would theoretically need to have it adjusted by only one day in 577.5 years.

Portuguese Perpetual Calendar

Item#: IWC0140204
IWC Watch Brand

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