IWC Portugieser Perpetual Calendar automatic white dial leather strap 44 mm

A major complication by IWC Schaffhausen

The Portugieser Perpetual Calendar 44 IW503701 celebrates one of IWC's most iconic complications. Originally developed in the 1980s by former head watchmaker Kurt Klaus, the IWC perpetual calendar has become a benchmark in fine watchmaking thanks to its ingenious construction and outstanding legibility. First introduced into the Portugieser collection in 2003, this complication is now one of the most prestigious pillars of the line.

A refined Silver Moon dial

This reference stands out with its elegant Silver Moon dial, offering a bright, refined and perfectly balanced aesthetic. Applied Arabic numerals, gold-plated feuille hands and the signature railway-track minute scale preserve the unmistakable Portugieser identity. Despite the richness of its indications, the dial remains exceptionally legible, displaying the day, date, month, year, power reserve and moon phase in a harmonious composition.

Perpetual calendar and double moon phase

A true expression of horological mastery, the perpetual calendar automatically takes into account the different lengths of the months as well as leap years. This Portugieser also features a four-digit year display, one of the most distinctive signatures of IWC's perpetual calendar. The double moon phase display shows the moon as seen from both the Northern and Southern Hemispheres, adding a poetic and highly technical dimension to this exceptional timepiece.

The IWC manufacture calibre 52616

Powering the watch is the IWC-manufactured calibre 52616, an automatic movement developed and assembled in Schaffhausen. Equipped with the renowned Pellaton winding system, it delivers an impressive 7-day power reserve, or 168 hours, thanks to its twin barrels. Visible through the sapphire crystal case back, the movement reveals a sophisticated architecture and refined finishing worthy of one of IWC's great complications.

The prestige of Armor Gold® 750/1000

The 44.4 mm case is crafted from Armor Gold® 750/1000, a precious alloy developed by IWC to offer enhanced hardness and improved wear resistance compared with conventional gold alloys. Its warm tones beautifully complement the Silver Moon dial and gold-plated appliques, creating a noble, luminous and timeless presence on the wrist. The double box-shaped sapphire crystals with anti-reflective coating add depth and elegance to the refined case construction.

A dark brown Santoni alligator leather strap

The Portugieser Perpetual Calendar 44 IW503701 is fitted with a dark brown alligator leather strap by Santoni. Its nuanced finish, suppleness and refined texture naturally enhance the precious character of the watch. Paired with the Armor Gold® 750/1000 case, it brings warmth, distinction and timeless sophistication to this exceptional IWC creation.