Portuguese Chrono-Automatic White Gold / Ardoise

The Portugieser originated in 1939 when two Portuguese importers commissioned IWC to build a wristwatch with the precision of a marine chronometer. The solution was to fit a large pocket watch movement — the Hunter calibre 74 — into a 41.5mm wristwatch case, enormous for its era. This created the Portugieser's defining characteristic: a large, thin case with a clean dial and slim hands that gives the impression of a pocket watch adapted for the wrist. The modern Portugieser family has expanded to include chronographs, perpetual calendars, and minute repeaters, but the essential character remains — restrained design, generous proportions, and a legibility that derives from the original marine chronometer brief.

The Portugieser Chronograph reference IW3714-31 has a white gold case and an ardoise dial.