IWC Portugieser Perpetual Calendar automatic dune dial leather strap 44 mm

An iconic haute horlogerie complication

The Portugieser Perpetual Calendar 44 IW503704 celebrates one of IWC Schaffhausen's greatest technical achievements. Developed by master watchmaker Kurt Klaus during the 1980s, the Manufacture's perpetual calendar automatically accounts for different month lengths and leap years while remaining remarkably simple to operate using only the crown. It remains one of the most admired perpetual calendar systems in modern watchmaking.

The elegance of the Dune dial

This reference is distinguished by its beautiful Dune dial, inspired by warm desert tones and created through an elaborate manufacturing process involving multiple layers of transparent lacquer polished to a brilliant finish. Applied Arabic numerals, gold-plated feuille hands and the signature railway-track minute scale preserve the unmistakable Portugieser identity while ensuring outstanding legibility. :contentReference[oaicite:5]{index=5}

Perpetual calendar and Double Moon™ display

The perpetual calendar displays the day, date, month, four-digit year and power reserve while automatically adjusting for leap years. The signature Double Moon™ display accurately reproduces the lunar cycles for both the Northern and Southern Hemispheres and will deviate by only one day after 577.5 years, highlighting the extraordinary precision achieved by IWC Schaffhausen. :contentReference[oaicite:6]{index=6}

The IWC manufacture calibre 52616

Powering the watch is the IWC-manufactured calibre 52616, developed and assembled in Schaffhausen. Equipped with the renowned Pellaton winding system featuring ceramic components, it delivers an impressive seven-day power reserve thanks to its twin-barrel architecture. Visible through the sapphire crystal case back, the movement showcases refined finishing and exceptional engineering. :contentReference[oaicite:7]{index=7}

The elegance of 750/1000 white gold

The refined 44.4 mm case is crafted from 750/1000 white gold, whose understated brilliance beautifully complements the warm Dune dial. The luxurious black Santoni alligator leather strap creates an elegant contrast while ensuring outstanding comfort. Together, these premium materials reinforce the timeless sophistication that defines the Portugieser collection.

Created for discerning collectors

The Portugieser Perpetual Calendar 44 IW503704 combines an iconic complication, an exceptional manufacture movement and precious materials in a timeless design. It is a remarkable expression of Swiss fine watchmaking, created for collectors seeking uncompromising technical excellence and enduring elegance.