Portofino Perpetual Calendar Stainless Steel / Silver

In Context

At 40 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. At 12.7 mm it is a tall case, and it will catch on a cuff. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. Rated to 30 m, it is protected against rain and splashes and nothing beyond that.

The movement winds itself from the motion of your wrist. 60 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 28,800 vph the seconds hand advances 8 times a second.

IW3446-01 stands on its own in this catalogue — no other reference here shares its base number. It pairs a silver matte dial with a stainless steel case. Introduced in 2022. Beyond the time it carries a perpetual calendar.

Mechanical movement with Pellaton automatic winding system; perpetual calendar with display for the date, day, month, leap year and perpetual moon phase – central hacking seconds

6 other watches in the library run the IWC 82650.

IWC

Ingenieur Perpetual Calendar Stainless Steel / Blue

IW3449-03 · 41.6 mm

IWC

Portofino Perpetual Calendar Rose Gold / Silver

IW344602 · 40 mm

IWC

Portugieser Perpetual Calendar 42 Stainless Steel / Green

IW3442-07 · 42.4 mm

IWC

Portugieser Perpetual Calendar 42 Red Gold / Blue / Boutique Edition

IW3442-05 · 42.4 mm