Bold statement upfront: Ceratanium doesn’t just dye a watch black—it reframes a classic Portugieser Chronograph as a bold, sportier statement you can wear daily. And this is the part most people miss: IWC is rethinking what a dress chronograph can feel like by trading traditional polish for a stealthy, all-dark vibe that still delivers elegance and precise engineering.
What’s new and notable
- IWC unveiled a limited edition Portugieser Chronograph in Ceratanium, a 1,500-piece run. This model moves away from the brand’s typical dressy chronographs and embraces a sleek, monochrome aesthetic with ceramicized titanium and matte black details across the dial.
- The case stays 41mm in diameter and 13.1mm thick, but the surface treatment shifts everything: polishing is replaced by a dark, matte finish created by Ceratanium. Ceratanium isn’t merely a coating; it’s a phase transformation of a proprietary titanium alloy that forms a ceramic crust when heated. This yields greater scratch resistance without the brittleness you’d expect from a fully ceramic case.
- The dial continues the low-contrast theme: applied numerals and indices in glossy anthracite sit atop a black dial, with a black minutes track printed on the rehaut. It mirrors the look of the Pilot’s Watch Chronograph 41 ’Top Gun’ Ceratanium in its subdued, monochrome execution.
- Exhibition caseback is smoked sapphire for a darker appearance, revealing the IWC-caliber 69355 with a column-wheel design and a 46-hour power reserve. To suit its sportier character, IWC pairs the watch with a black rubber strap rather than a leather or metal bracelet.
- Though its style is sport-forward, the watch preserves the Portugieser Chronograph’s 30-meter water resistance. The initial wearer spotted with this piece appears to be musician Ed Sheeran, who was seen wearing the Ceratanium chronograph on tour, continuing a pattern of high-profile brand associations.
The basics
- Brand: IWC
- Model: Portugieser Chronograph Ceratanium
- Reference: IW371631
- Diameter: 41mm; Thickness: 13.1mm
- Case material: Ceratanium
- Dial: Black; Indices: Applied; Lume: No
- Water resistance: 3 bar
- Strap: Rubber with Ceratanium pin buckle
The movement
- Caliber: IWC-manufactured 69355
- Functions: Hours, minutes, seconds, chronograph
- Power reserve: 46 hours
- Winding: Automatic
- Frequency: 28,800 vph (4 Hz)
- Jewels: 27
- Chronometer certification: No
Pricing and availability
- Price: $14,600
- Availability: Now
- Limited edition: Yes, 1,500 pieces
Why this matters (and a quick take)
Ceratanium is a compelling material choice because it supports darker case aesthetics without sacrificing durability. The combination of a delicate Portugieser dial language with an aggressively rugged material creates a unique juxtaposition: refined, yet rebellious. The rubber strap aligns with the overall sport-forward look, even if some collectors might prefer a leather option for dressier occasions.
In practice, the visual effect isn’t as stark as it appears in photos; slight angles and reflections reveal legibility that isn’t obvious at first glance. The result is a watch that feels both discreet and distinct—a limited, conversation-starting variant that broadens what IWC can do with the Portugieser line while staying true to its core chronograph spirit.
Would you choose a Ceratanium Portugieser for everyday wear or reserve it for special occasions? And does pushing a historically dressy chronograph toward a sportier, darker identity appeal to you, or would you prefer a more traditional execution? If you’d like, I can tailor this rewrite further to emphasize your preferred angles (technical focus, fashion stance, or collector’s viewpoint).
