The IWC Portugieser Perpetual Calendar Edition “150 Years” (ref. IW503405) is a limited edition of 250 pieces introduced in 2018 to celebrate IWC Schaffhausen’s 150th anniversary. Crafted in 18-carat red gold, it features a 44.2mm case and a striking white lacquered dial with blued hands, combining classic Portugieser aesthetics with one of IWC’s signature complications. Inside is the in-house calibre 52615 automatic movement with Pellaton winding, ceramic components, a seven-day power reserve, and a perpetual calendar displaying the date, day, month, four-digit year, and an exceptionally accurate double moon phase for both the northern and southern hemispheres. The sapphire caseback reveals the movement’s solid gold rotor engraved with the Jubilee emblem, while the watch is paired with a black Santoni alligator leather strap, making it one of the most collectible modern Portugieser perpetual calendars.