IWC HIGHLIGHT

Elegance meets engineering

Fresh, refined and understated, the Portofino Perpetual Calendar combines one of IWC Schaffhausen’s most emblematic complications with the characteristic Portofino design. Featuring a simple round case, Roman numerals and applied hour markers, the Portofino is a classic and elegant wristwatch. Thanks to the purity of its lines, it is exceptionally versatile and can easily be paired with casual and elegant outfits.

IWC portofino watch with white dial and gold case on a man's wrist

The IWC Perpetual Calendar

No complication embodies IWC’s unique engineering approach quite like the perpetual calendar. Developed in the 1980s by Kurt Klaus and consisting of less than 100 ingeniously arranged parts, the calendar is distinguished by its high level of autonomy and user-friendliness. With the Portofino Perpetual Calendar, the iconic complication now returns to the Portofino collection in 18-carat 5N gold and stainless steel – marking the first Portofino Perpetual Calendar in stainless steel.

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IWC portofino perpetual calendar watch with white dial, gold case and blue strap on a white background

Compact and versatile

With a case diameter of just 40 millimeters, the Portofino Perpetual Calendar is currently the most compact perpetual calendar watch across IWC’s collections, ensuring perfect wearability for all wrist sizes. Integrated into a movement from the IWC-manufactured 82100 calibre family, the calendar displays the date, month, weekday and moon phase in three subdials at 3, 6, and 9 o’clock. A small indicator informs about whether the current year is a leap year. Another highlight is the perpetual moon phase display, which shows the moon against the backdrop of a star-studded sky.

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IWC Double Moon Phase watch with blue dial and blue leather straps

A feat of engineering

A mechanical program for a wristwatch that replicates the Gregorian calendar with all its many irregularities: IWC’s former head watchmaker Kurt Klaus achieved this engineering feat in the 1980s with his legendary perpetual calendar. Designed as a separate module and driven by a single nightly switching impulse from the base movement, the calendar’s displays are perfectly synchronized with each other. As a result, they can be advanced simply via the crown, making it exceptionally easy to use.

Smart mechanical program

The heart of the mechanical program is the month cam, which provides the calendar module the information about the differing lengths of the months. It contains a complete four-year cycle with 48 recesses around its edge. One recess is different from all the others. When a dedicated lever falls into it, the calendar will know it’s a leap year and insert the 29th of February. This smart mechanical program will continue to run without manual intervention until 2100, when the leap year due is omitted due to an exception in the Gregorian calendar.

Double moon phase display

Selected perpetual calendar models in the Pilot’s Watches and Portugieser collections feature another innovation from IWC – the practical double moon phase display. It shows the current moon phase for the northern and southern hemispheres simultaneously, meaning you will see the correct moon phase no matter if you are in London or Johannesburg. Thanks to a special reductionist gear train, the display is so precise that it will only deviate from the actual orbit of Earth’s satellite by one day after 577.5 years.

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Browse our timepieces

Portofino Perpetual Calendar

IW344601

Portofino Perpetual Calendar

IW344602

Portugieser Perpetual Calendar 42

IW344207

Portugieser Perpetual Calendar 42

IW344203

Portugieser Perpetual Calendar

IW503302

Big Pilot’s Watch Perpetual Calendar

IW503605

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Elegance meets engineering

The IWC Perpetual Calendar

Compact and versatile

Browse our timepieces

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