IWC Portugieser Chronograph Ceratanium®
IW371631
Since its introduction in 1998, the Portugieser Chronograph has been defined by sporty elegance, vertically arranged subdials and a crisp quarter-second scale. Reference IW371631 recasts that recognizable silhouette in the collection’s first all-black Ceratanium® execution, limited to 1,500 pieces and matched with a black dial, hands, appliqués and textured rubber strap. The 41 mm case combines titanium-like lightness and robustness with ceramic-like hardness and scratch resistance, while the automatic IWC-manufactured calibre 69355 delivers chronograph timing and a 46-hour power reserve.
Reference: IW371631
Movement: Automatic, calibre 69355
Power reserve: 46 hours
Case: Ceratanium®, 41 mm
Dial: Black
Crystal: Sapphire
Strap/bracelet: Black rubber strap
Features: Chronograph; Stop-seconds; Anti-reflective crystal
Water resistance: 30 m / 3 ATM
Year: 2026 — Full set
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