IWC IW502307 Portuguese Perpetual Calendar 18K White Gold Gray Dial

The IWC Portuguese Perpetual Calendar Ref. IW502307 is a pinnacle of haute horlogerie, housed in a substantial 44.2 mm 18‑carat white gold case introduced in the early 2010s. Its ardoise gray dial is meticulously balanced with applied white gold Arabic numerals and leaf‑shaped hands, framing the signature perpetual calendar layout with subdials for day, date, month, moonphase, and a four‑digit year display, powered by the in‑house Caliber 51613 with a seven‑day (168‑hour) Pellaton automatic winding system. A sapphire exhibition caseback reveals the finely finished movement, while the sapphire crystal front ensures clarity and durability. With a modest 3 bar (30 m) water resistance, this is a dress watch that emphasizes mechanical sophistication over ruggedness. The combination of a full perpetual calendar, moonphase, and week‑long power reserve in a precious metal case makes it highly coveted among collectors. Its technical pedigree, limited production, and timeless Portuguese lineage underscore its status as a refined and rare complication piece. Excellent Condition with IWC box and papers dated 2012. This Portuguese Perpetual was just fully serviced by IWC in Q2/2026.