If you’ve already read our feature on the IWC Pilot’s Venturer Vertical Drive, you’ll know that IWC Schaffhausen arrived at Watches and Wonders 2026 determined to push the boundaries of traditional watchmaking. After engineering a mechanical watch specifically for human spaceflight, the Swiss manufacturer has now turned its attention to something completely different—creating a Big Pilot’s Watch that glows long after the lights go out.

At first glance, the Big Pilot’s Watch Perpetual Calendar Ceralume looks like a clean white ceramic version of the Pilot’s Watch. Turn off the lights, however, and it transforms into something extraordinary. Thanks to IWC’s proprietary Ceralume technology, the 46.5mm ceramic case, dial and even the rubber strap emit a vivid blue glow for more than 24 hours, creating one of the most visually striking watches unveiled this year. Limited to just 250 pieces, it’s a bold demonstration of what IWC Schaffhausen’s experimental XPL division can achieve.

The glow might be what catches your eye first, but it certainly isn’t the whole story. Beneath the luminous exterior sits Kurt Klaus’ legendary perpetual calendar, powered by an in-house movement and housed in one of the most technically advanced ceramic cases IWC has ever produced. Here’s everything you need to know about the Big Pilot’s Watch Perpetual Calendar Ceralume.

By daylight, the Big Pilot’s Watch Perpetual Calendar Ceralume presents a surprisingly restrained appearance. The 46.5mm case, dial and rubber strap are finished almost entirely in white, creating a clean aesthetic that’s enhanced by subtle contrasts between matte and polished surfaces. For a watch of this size, it feels remarkably understated, proving that IWC’s latest material innovation doesn’t need to shout to make an impression.

That calm personality disappears the moment the lights go out. Charged by natural or artificial light, the Ceralume ceramic case, luminous dial and rubber strap emit an intense blue glow that lasts for more than 24 hours. Against this vivid backdrop, the numerals, calendar displays and the edges of the grey hands become dark silhouettes, giving the watch a completely different identity after dark. It’s a transformation that very few mechanical watches can deliver and one that demonstrates just how far IWC has pushed its proprietary luminous ceramic technology.

Beneath this highly experimental exterior sits one of IWC Schaffhausen’s most respected movements, the IWC-manufactured Calibre 52616. At its heart is Kurt Klaus’ perpetual calendar, a complication first developed during the 1980s that remains one of the brand’s defining achievements. The movement displays the day, date, month, a neatly integrated four-digit year positioned between 7 and 8 o’clock, and IWC’s signature Double Moon® display, all without compromising the dial’s clean layout.

The Double Moon® display is far more than a visual flourish. It tracks the lunar phases as seen from both the Northern and Southern Hemispheres and is so mathematically precise that it requires a correction of just one day every 577.5 years. Meanwhile, the Pellaton automatic winding system, reinforced with virtually wear-free ceramic components, provides a generous 168-hour (7-day) power reserve, ensuring the movement is every bit as capable as the materials surrounding it.

IWC has carried the luminous concept all the way through to the back of the watch. Visible beneath the sapphire caseback, the movement is decorated with circular graining and blued screws, while the “Probus Scafusia” medallion integrated into the rotor is also crafted from luminous material, allowing it to glow in the dark alongside the rest of the watch. It’s a subtle detail that ties the entire concept together and shows that Ceralume® wasn’t simply applied to the exterior—it was considered from every angle.

• Brand: IWC Schaffhausen
• Model: Big Pilot’s Watch Perpetual Calendar Ceralume
• Reference: IW505801
• Diameter: 46.5 mm
• Thickness: 15.9 mm
• Material: Ceralume
• Dial: White
• Calibre: Automatic Self-Winding 52616
• Power Reserve: 168 Hours – 7 Days
• Water-Resistance: 10 Bar (100 metres, 330 feet)
• Price: USD $76,300 (Limited Edition – 250 Pieces)