IWIW504501-Portugieser Perpetual Calendar Tourbillon Edition “150 Years”

IW504501

Portugieser Perpetual Calendar Tourbillon Edition “150 Years”

Premiere in the anniversary year: the Portugieser Perpetual Calendar Tourbillon Edition “150 Years” unites the perpetual calendar from Kurt Klaus with a tourbillon on the dial.

IW504501

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  • 18 ct red gold case
  • Automatic, self-winding
  • Black alligator leather strap by Santoni
  • Diameter 45.0 mm

This watch is available in different materials and colours

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THE STORY

With the Portugieser Perpetual Calendar Tourbillon Edition “150 Years”, IWC combines the legendary perpetual calendar from Kurt Klaus with a tourbillon on the dial for the first time. This masterpiece of watchmaking is available in a limited edition of 50 watches. It has an 18-carat red gold case, a white dial with a lacquered finish, and blued hands. The watch is powered by the IWC-manufactured 51950 calibre, an extension of the 51900 calibre with the addition of a perpetual calendar. To make the tourbillon visible at “12 o’clock”, the designers opened up the calendar advance ring and integrated the moon phase in the month display at “6 o’clock”. This tourbillon complication is made up of 82 individual components and weighs just 0.635 grams. With its solid gold rotor, the automatic Pellaton winding system generates a power reserve of 7 days.

Specifications

case

case

  • 18 ct red gold case
  • Diameter 45.0 mm
  • Height 15.3 mm
  • See-through sapphire glass back
  • Water resistance 3 bar

Movement

Movement

  • 51950 Calibre
  • Automatic, self-winding
  • Frequency 19800.0 vph (2.75 hz)
  • 44 Jewels
  • 168 hours Power Reserve
  • IWC-manufactured movement
  • Côtes de Genève, perlage

Features

Features

  • Flying minute tourbillon
  • Perpetual calendar with displays for the date, day, month, year in four digits and perpetual moon phase
  • 7 days power reserve
  • Power reserve display
  • Sapphire glass, arched-edge, antireflective coating on both sides
  • Pellaton automatic winding
  • Rotor in 18-carat red gold
  • Limited to 50 pieces

dial

dial

  • White dial

Strap

Strap

  • Black alligator leather strap by Santoni

Calibre Family 50000

It needs winding only once a week: the 50000-calibre family features the efficient Pellaton pawl-winding system with a 7-day power reserve and a Breguet spring for maximum precision.

Tourbillon Mystère

Watch lovers are particularly fascinated by the unusual arrangement of the “flying” tourbillon, consisting of 82 parts, against a deep black background, creating the illusion that the filigree cage containing the balance is rotating in mid-air.

Perpetual calendar

The perpetual calendar is one of the most fascinating haute horlogerie complications. Originally developed by former chief designer Kurt Klaus and continuously improved since then, it is mechanically programmed for 577 years.

Moon phase display

IWC’s moon phase displays are not just aesthetic works of art – they are extremely precise and diverge from the actual phase of the moon by just 1 day in 577.5 years.

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