IWC Portugieser Perpetual Calendar automatic black dial leather strap 44 mm

An iconic grand complication by IWC Schaffhausen

The Portugieser Perpetual Calendar 44 IW503702 showcases one of IWC Schaffhausen's most celebrated complications. Originally conceived by master watchmaker Kurt Klaus in the 1980s, the Manufacture's perpetual calendar has become a benchmark thanks to its ingenious fully synchronised mechanism. Easily adjusted via the crown, it automatically accounts for different month lengths and leap years, offering exceptional practicality while preserving outstanding readability.

A sophisticated black sunray dial

This reference is distinguished by its magnificent black sunray dial, whose changing reflections create remarkable visual depth. Applied Arabic numerals and gold-plated feuille hands provide elegant contrast while maintaining the timeless identity of the Portugieser collection. Despite the wealth of information displayed, the dial remains perfectly balanced, presenting the day, date, month, power reserve, four-digit year and double moon phase in a beautifully harmonious layout.

Perpetual calendar and double moon phase

Designed to operate until the year 2100 without manual correction, the perpetual calendar automatically compensates for months of different lengths as well as leap years. The watch also features IWC's signature four-digit year display. Positioned at 12 o'clock, the double moon phase accurately reproduces the lunar cycles of both the Northern and Southern Hemispheres, adding a poetic dimension to this exceptional complication.

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 incorporating highly wear-resistant ceramic components, it delivers an impressive seven-day power reserve thanks to its twin-barrel construction. The sapphire crystal case back reveals the movement's sophisticated architecture and refined finishing, showcasing the Manufacture's exceptional expertise.

The prestige of Armor Gold® 750/1000

The 44.4 mm case is crafted from Armor Gold® 750/1000, an exclusive alloy developed by IWC to offer enhanced hardness and durability compared with conventional gold. Its warm tones beautifully contrast with the rich black sunray dial, while the black Santoni alligator leather strap perfectly complements the watch's luxurious character and timeless elegance.

Designed to endure for generations

The Portugieser Perpetual Calendar 44 IW503702 is a true expression of IWC Schaffhausen's watchmaking expertise. Combining one of the Manufacture's most prestigious complications with exceptional materials and a high-performance manufacture movement, it is a remarkable timepiece created for collectors who appreciate both technical excellence and timeless design.