IWC Portugieser Perpetual Calendar automatic horizon blue dial leather strap 44 mm

An iconic grand complication from IWC Schaffhausen

The Portugieser Perpetual Calendar 44 IW503703 showcases IWC Schaffhausen's exceptional expertise in haute horlogerie. Based on the perpetual calendar system developed by master watchmaker Kurt Klaus in the 1980s, this sophisticated complication automatically accounts for varying month lengths and leap years while remaining remarkably simple to adjust via the crown. It stands as one of the Manufacture's most iconic achievements in mechanical watchmaking.

The beauty of the Horizon Blue dial

This reference is distinguished by its captivating Horizon Blue dial, whose remarkable depth and changing reflections are achieved through an elaborate manufacturing process. Applied Arabic numerals, rhodium-plated feuille hands and the signature railway-track minute scale preserve the unmistakable Portugieser identity. Despite the wealth of information displayed, the perpetual calendar remains perfectly legible thanks to a balanced dial layout, while the double moon phase display at 12 o'clock adds both technical sophistication and poetic charm.

The IWC manufacture calibre 52616

At the heart of the watch beats the IWC-manufactured calibre 52616, entirely developed and assembled in Schaffhausen. Equipped with the renowned Pellaton winding system featuring highly wear-resistant ceramic components, it delivers an impressive seven-day power reserve through its twin-barrel construction. Visible through the sapphire crystal case back, the movement reveals refined finishing and sophisticated engineering worthy of one of IWC's flagship complications.

The understated prestige of 750/1000 white gold

The elegant 44.4 mm case is crafted from 750/1000 white gold, whose subtle brilliance perfectly enhances the luminous Horizon Blue dial. Polished finishes accentuate the refined proportions of the Portugieser case, while the blue calfskin leather strap fitted with the EasX-CHANGE® system offers outstanding comfort and effortless strap changes without the need for tools.

Built for generations

The Portugieser Perpetual Calendar 44 IW503703 perfectly embodies IWC Schaffhausen's philosophy of combining timeless aesthetics with advanced mechanical engineering. Its perpetual calendar, seven-day manufacture movement and elegant 750/1000 white gold case make it an exceptional timepiece for collectors seeking uncompromising technical excellence and enduring sophistication.