Offered is an IWC Portugieser Perpetual Calendar 44 reference IW503703 in new unworn condition , with box and papers .

This reference is distinguished by its striking Horizon Blue dial , one of the most captivating executions within the Portugieser collection. The rich metallic blue tone enhances the visual depth of the perpetual calendar layout while preserving the collection’s signature elegance and legibility.

The watch is housed in a 44.2 mm stainless steel case , combining commanding wrist presence with refined proportions. The perpetual calendar indications — date, day, month, four-digit year, and perpetual moon phase — are seamlessly integrated into the classic Portugieser dial architecture and adjusted entirely via the crown.

The moon phase display is engineered for exceptional precision, remaining accurate for 577.5 years with minimal deviation.

Powering the watch is the IWC-manufactured Calibre 52615 , an automatic movement featuring the Pellaton winding system with ceramic components for durability and efficiency. The movement delivers an impressive 7-day (168-hour) power reserve and is visible through the sapphire exhibition caseback, showcasing refined finishing and IWC’s signature rotor design.

With its bold Horizon Blue dial, technical sophistication, and long power reserve, this reference represents one of the most compelling modern perpetual calendars in the Portugieser lineup.

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Details:

-Brand: IWC Schaffhausen
-Model: Portugieser Perpetual Calendar 44
-Reference: IW503703
-Case: Stainless steel
-Case Size: 44.2 mm
-Dial: Horizon Blue
-Movement: IWC Calibre 52615 (automatic, Pellaton winding)
-Power Reserve: Approximately 7 days (168 hours)
-Functions: Hours, minutes, small seconds, perpetual calendar (date, day, month, four-digit year), perpetual moon phase
-Crystal: Sapphire (front and exhibition caseback)
-Water Resistance: 30 meters

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Condition:

-New unworn condition
-Fully functional

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Included:

-Box and Papers

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The Purchase Experience:

Trades Considered: We are active traders. If you are looking to rotate your collection, let’s talk.

Integrity First: We operate with transparency and discipline, focusing on accurate descriptions and straightforward transactions.

Family Operated: A small, dedicated team focused on human connections, not volume.

Visual Transparency: We utilize a strong macro lens for photography. This may cause minor dust or hairlines to appear more pronounced than they are in person.

Shipping: We ship fully insured with package tracking.

Questions: We take an advisor-first approach and are happy to help determine if this watch is the right fit for your collection.