IWC Portugieser

Portugieser Annual Calendar

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reference 5035

The newly developed annual calendar shows the month, date and day in three separate, semicircular windows. The date advance system takes the different lengths of the months into account. Only February and the leap years need to be corrected manually using the crown. The new IWC-manufactured 52850 calibre has two barrels that together generate a seven-day power reserve.

Highlights

  • Pellaton automatic winding
  • IWC-manufactured 52850 calibre
  • 7-day power reserve
  • Annual calendar with month, date and day
  • Diameter 44.2 mm

Price: $20,900

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THE PREMIERE OF THE IWC ANNUAL CALENDAR

In 2015, the Year of the Portugieser (Portuguese), IWC’s newly developed annual calendar is another attractive complication. Located at “12 o’clock” on the dial, the annual calendar shows the month, date and day in three separate, semicircular windows. The switching mechanism automatically takes into account the differing lengths of individual months. Unlike a perpetual calendar, however, the annual calendar is unable to factor in the differing length of the month of February or the leap years. Once a year, then, at the end of February, it requires manual correction. The necessary correction is made as simply and conveniently as possible via the crown. In order to free up as much space as possible for the date display, the designers replaced the indices from “11 o’clock” to “1 o’clock” with the three display discs. The rare combination of an annual calendar and 7-day calibre should make this latest complication from the House of IWC even more fascinating for watch connoisseurs. The timepiece is available in an 18-carat red gold case with a silver-plated dial or in stainless steel with a silver-plated or midnight blue dial. The arched-edge sapphire glass makes the case look slimmer and underscores the watch’s classic elegance. The curved strap horns ensure greater comfort even on a slimmer wrist. On the reverse side, the see-through sapphire-glass back provides an unimpeded view of the exquisite new IWC-manufactured 52850 calibre.

Variations

Details

  • Reference IW503501
  • Case Material stainless steel
  • Bracelet/Strap black alligator leather strap
  • Dial Colour silver-plated
  • Jewels 36
  • Calibre 52850
  • Mechanical movement
  • Pellaton automatic winding
  • IWC-manufactured 52850 calibre
  • 7-day power reserve when fully wound
  • Power reserve display
  • Annual calendar with displays for the date, day and month
  • Small hacking seconds at 9 o’clock
  • Glucydur®* beryllium alloy indexless balance with high-precision adjustment screws on balance rim
  • Breguet spring
  • Rotor with 18-carat gold medallion
  • Sapphire glass, arched edge, antireflective coating on both sides
  • See-through sapphire-glass back
  • Water-resistant 3 bar
  • Case height 15.3 mm
  • Diameter 44.2 mm
  • *IWC Schaffhausen is not the owner of the Glucydur® trademark.

  • Reference IW503502
  • Case Material stainless steel
  • Bracelet/Strap black alligator leather strap
  • Dial Colour midnight blue
  • Jewels 36
  • Calibre 52850
  • Price $20,900
  • Mechanical movement
  • Pellaton automatic winding
  • IWC-manufactured 52850 calibre
  • 7-day power reserve when fully wound
  • Power reserve display
  • Annual calendar with displays for the date, day and month
  • Small hacking seconds at 9 o’clock
  • Glucydur®* beryllium alloy indexless balance with high-precision adjustment screws on balance rim
  • Breguet spring
  • Rotor with 18-carat gold medallion
  • Sapphire glass, arched edge, antireflective coating on both sides
  • See-through sapphire-glass back
  • Water-resistant 3 bar
  • Case height 15.3 mm
  • Diameter 44.2 mm
  • *IWC Schaffhausen is not the owner of the Glucydur® trademark.

  • Reference IW503504
  • Case Material 18-carat red gold
  • Bracelet/Strap black alligator leather strap
  • Dial Colour silver-plated
  • Jewels 36
  • Calibre 52850
  • Mechanical movement
  • Pellaton automatic winding
  • IWC-manufactured 52850 calibre
  • 7-day power reserve when fully wound
  • Power reserve display
  • Annual calendar with displays for the date, day and month
  • Small hacking seconds at 9 o’clock
  • Glucydur®* beryllium alloy indexless balance with high-precision adjustment screws on balance rim
  • Breguet spring
  • Rotor with 18-carat gold medallion
  • Sapphire glass, arched edge, antireflective coating on both sides
  • See-through sapphire-glass back
  • Water-resistant 3 bar
  • Case height 15.3 mm
  • Diameter 44.2 mm
  • *IWC Schaffhausen is not the owner of the Glucydur® trademark.

Watch Viewer

  • IW503501 Watch Front
  • IW503501 Watch Back
  • IW503502 Watch Front
  • IW503502 Watch Back
  • IW503504 Watch Front
  • IW503504 Watch Back

Enlarge

Annual Calendar

Located at “12 o’clock” on the dial, IWC’s annual calendar shows the month, date and day in three separate windows. The mechanism automatically takes into account the differing lengths of individual months. Unlike a perpetual calendar, however, the annual calendar is unable to make allowance for the leap days in February or the leap years. Once a year, then, at the end of February, it requires manual correction. In the case of IWC’s annual calendar, the correction is made simply, via the crown. The hour wheel sets in motion the date advance wheel, which is equipped with two different advance fingers. One of the fingers is responsible for the date and month displays, the other for the weekday. Every night, towards midnight, the date is moved forward with the help of the upper advance finger. Two pins on the date disc control the month display and the programme wheel that defines the various lengths of the months. The first of these pins advances the programme wheel by one division. A feeler recognizes 30-day months on the advance lever. The feeler registers a deeper insert on the programme wheel and makes more space available for the advance. The following day, the advance lever moves the date forward by 2 days.

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