IWC BIG PILOT PERPETUAL CALENDAR IW503605

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$38,700.00$45,800.00 (-16%)

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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.

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IWC Big Pilot’s Watch Perpetual Calendar
No other complication has taken centre stage on the dial of the Big Pilot’s Watch more often than the perpetual calendar. Developed during the 1980s by IWC’s former head-watchmaker Kurt Klaus, the large dial not only lends itself well to the mechanism’s many display, but it also makes reading of the calendar information particularly easy. The Big Pilot’s Watch Perpetual Calendar features a stainless steel case, a blue dial, rhodium-plated hands and a blue calfskin strap. The perpetual calendar automatically recognizes the different month lengths and the leap years, and will not require a manual adjustment until 2100. Engineered from only about 80 individual parts, the calendar module is driven by a single nightly switching pulse from the IWC-manufactured 52615 calibre. Components of the Pellaton winding system that are subject to severe stresses are made of virtually wear-free ceramic. When fully wound, the two barrels store a power reserve of seven days. The elaborately decorated manufacture movement is visible through the sapphire glass back.

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.

Double Moon | IWC Schaffhausen

The double moon display shows the current moon phase for the northern and southern hemispheres simultaneously. In each lunar month, the moon’s orbit as displayed on the watch deviates by about 12 seconds. Thanks to its ingenious design, the double moon only needs to be adjusted by 1 day every 577 years.

  • Small hacking seconds
  • Rotor with 18-carat gold medallion
  • Sapphire glass, convex, antireflective coating on both sides
  • Glass secured against displacement by drop in air pressure
  • Power reserve display
  • Perpetual calendar with displays for the date, day, month, year in four digits and perpetual moon phase for the northern and southern hemisphere
  • 7 days power reserve
  • Case Stainless steel Case
  • Diameter 46.2 mm
  • Height 15.4 mm
  • Screw in crown true
  • Back case See-through sapphire glass back
  • Water resistance 6.0 bar
  • Calibre 52616 Calibre
  • Movement type Automatic winding
  • Power Reserve Indicator 168 hours power reserve
  • Frequency 28’800 VPH (4 Hz)
  • Components 379 Components
  • Jewels 54 Jewels

Additional information

Reference Number

iw503605

Case Diameter

Case Shape

Round

Color

,

Gender

Men

Material

Stainless Steel

Movement

Automatic, Mechanical

Strap

Style

Casual, Dress, Pilot, Sports

Water Resistance

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