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New Releases · 2026-04-14

IWC’s Ceralume Big Pilot makes an entire perpetual calendar glow

Reference IW505801 uses luminous ceramic, a luminous dial and a luminous rubber strap around a seven-day perpetual-calendar movement.

By Chronolume digest · Original English summary · Based on IWC Schaffhausen

Front view of IWC Big Pilot Perpetual Calendar Ceralume IW505801
In daylight, the Ceralume reference reads as a white-and-grey perpetual calendar. IWC / S&S Group ↗

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This is a sourced news summary, not a hands-on review. Read the original reporting at IWC Schaffhausen ↗

What to know

The Big Pilot’s Watch Perpetual Calendar Ceralume, reference IW505801, turns IWC’s experimental luminous ceramic into a production watch. Its 46.5mm white ceramic case contains Super-LumiNova pigments, while the dial and rubber strap receive related luminous treatments. In daylight the watch is a study in white and grey; after charging, the case, dial and strap emit a vivid blue glow for more than 24 hours.

IWC Big Pilot Perpetual Calendar Ceralume IW505801 glowing blue in darkness
Ceralume pigments make the case, dial and strap glow after charging. IWC / Monochrome ↗

IWC’s automatic calibre 52616 adds a seven-day power reserve to the Kurt Klaus perpetual calendar. Date, weekday, month, moon phase and four-digit year are coordinated mechanically, with the Double Moon display accurate to one day in 577.5 years. The glowing Probus Scafusia rotor medallion extends the material concept to the movement side. Production is limited to 250 pieces.

Alternative front view of IWC Big Pilot Perpetual Calendar Ceralume IW505801
The perpetual calendar includes a Double Moon display and four-digit year. IWC / Greenleaf & Crosby ↗

At a glance

Specifications reported by IWC Schaffhausen
referenceIW505801
caseCeralume luminous ceramic, 46.5 mm
dialWhite luminous dial
movementIWC calibre 52616 automatic
calendarPerpetual calendar with Double Moon and four-digit year
powerReserve168 hours / 7 days
moonPhaseAccuracyOne day in 577.5 years
strapWhite luminous rubber
limitedEdition250 pieces

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IWC Schaffhausen Big Pilot Perpetual Calendar Ceralume IW505801 · IW505801 ↗

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Source & attribution

IWC Schaffhausen · Published 2026-04-14 ↗