A moon you can rely on, even under cloudy skies: the perpetual calendar's high-precision moon phase display needs a one-day adjustment every 577.5 years.
ReferenceIW503301
Dial ColorGrey
Case18 ct white gold
StrapBlack alligator leather strap by Santoni
Diameter44.2 mm
MovementAutomatic, self-winding, IWC-manufactured movement
