Portuguese Perpetual Calendar

The IWC Portugieser Perpetual Calendar 42 IW344203 is an exceptional example of haute horlogerie within the certified pre-owned luxury watch category. Combining classic proportions with one of the most admired complications in mechanical watchmaking, this timepiece encapsulates IWC Schaffhausen’s mastery in both functional innovation and timeless design. The perpetual calendar — traditionally a complex and highly prized mechanical feature — is now presented in a 42 mm stainless steel case, making it remarkably wearable while preserving technical sophistication.

At the heart of this model beats the in-house automatic calibre 82650, part of IWC’s advanced 82000-calibre family. This beautifully finished movement incorporates an automatic Pellaton winding system with ceramic components, delivering a 60-hour power reserve and reliable performance across extended wear. The movement drives the perpetual calendar mechanism that automatically accounts for month length and leap years, displaying date, day, month, weekday, moon phase and year across its elegantly balanced sub-dials — all without requiring adjustment until 2100 under normal use.

The silver-plated dial, protected by a scratch-resistant sapphire crystal with anti-reflective treatment, features refined leaf-style hands and applied markers that echo the refined aesthetic of the Portugieser line. Its clean, classical presentation enhances legibility for both time and calendar functions, while the see-through sapphire case back provides a window into the meticulous craftsmanship of the automatic movement.

Paired with a premium black alligator leather strap by Santoni and a traditional folding clasp, the watch exudes enduring elegance suitable for both formal occasions and everyday luxury. Water-resistant to 30 metres (3 ATM), this model balances refined design with practical durability.

Offered in very good pre-owned condition complete with original box and papers, the IWC Portugieser Perpetual Calendar 42 IW344203 represents a rare opportunity to acquire one of IWC’s most sophisticated complications in a beautifully proportioned and enduringly stylish package.