IWC Schaffhausen Portofino Perpetual Calendar

Swiss luxury watch brand IWC Schaffhausen brings the iconic perpetual calendar back to the Portofino collection. With a 40mm diameter case, the Portofino Perpetual Calendar is currently the smallest perpetual calendar watch in IWC’s collections.

It houses the IWC-manufactured 82650 calibre movement, featuring automatic Pellaton winding with ceramic components and a power reserve of 60 hours. In addition to displays for the date, weekday, and month, the calendar features IWC’s perpetual moon phase indication, which will only deviate by one day from the orbit of Earth’s satellite in 577.5 years.

Two versions are available. One features a stainless steel case with a silver-plated dial and rhodium-plated hands and appliques (Ref. IW344601) – marking the first time a Portofino model with a perpetual calendar is presented in this classic and robust case material. The other features an 18-carat 5N gold case, a silver-plated dial and gold-plated hands and appliques (Ref. IW344602).

IWC Schaffhausen Portofino Perpetual Calendar stainless steel

The calendar information is indicated in three subdials. The date is shown at 3 o’clock, the month at 6 o’clock, and the day of the week at 9 o’clock. The weekday display also contains a small leap year indicator: a red “L” signals a leap year, and the calendar will autonomously insert the 29th of February. Another highlight of this model is the perpetual moon phase display.

Integrated into the month display, it shows the moon against the backdrop of a star-studded night sky. Thanks to a precisely calculated reductionist gear train, it is so precise that it will only deviate by one day from the orbit of Earth’s satellite after 577.5 years.

IWC Schaffhausen Portofino Perpetual Calendar pink gold version

The IWC-manufactured 82650 calibre drives the calendar module using a single nightly switching impulse. The elaborately finished movement can be admired through the transparent sapphire glass back.

It features the highly efficient automatic winding system developed in the 1950s by IWC’s former technical director, Albert Pellaton. Using the slightest movements of the oscillating weight in both directions, it reliably builds up a power reserve of 60 hours in the mainspring.

IWC Schaffhausen Portofino Perpetual Calendar movement

Components of the automatic winding system that are subject to high stresses, such as the heart-shaped cam and the clicks, are made of virtually wear-free zirconium oxide ceramic. In addition, the rotor features the signature “Probus Scafusia” medallion in solid gold, which embodies IWC’s uncompromising commitment to technical excellence, quality, and sustainability.

IWC Schaffhausen Portofino Perpetual Calendar gold movement

Both versions come with blue straps made of traceable Swiss calf leather.

The Portofino Perpetual Calendar is available immediately through IWC boutiques, authorised retail partners, or online at In addition, the timepieces are eligible for registration under the My IWC care program, benefitting from a 6-year extension to the standard 2-year International Limited Warranty.

Technical details

Model: IWC Schaffhausen Portofino Perpetual Calendar Ref. IW344601 / IW344602

Calibre 82650
Frequency: 28,800 vph / 4 Hz
Jewels: 46
Power reserve: 60 h
Winding: Automatic
Pellaton automatic winding system

Perpetual calendar with display for the date, day, month, leap year and perpetual moon phase
Central hacking seconds

Case, dial and strap
Ref. IW344601: Stainless steel case, silver-plated dial, rhodium-plated hands and appliques, blue calfskin strap
Ref. IW344602: 18-carat 5N gold case, silver-plated dial, gold-plated hands and appliques, blue calfskin strap
Glass: Sapphire, arched-edge, antireflective coating on both sides
Diameter: 40 mm
Height: 12.7 mm
See-through sapphire glass back
Water-resistance: 5 bar