IWC Portuguese Grande Complication Ref. IW377602 – 18K Rose Gold | Perpetual Calendar | Moonphase | Chronograph | Cal. 79091

An Icon of Horological Excellence in Grande Complication Form

The IWC Portuguese Grande Complication Ref. IW377602 is a breathtaking example of haute horlogerie, combining elegant Portuguese design DNA with the mechanical sophistication of a grand complication. Crafted in 18K rose gold, this masterpiece features a perpetual calendar, moon phase, and chronograph functions — all harmoniously displayed on a beautifully balanced dial.

The silvery white dial is both understated and technically rich, displaying:

Perpetual Calendar with date, day, month, and year indications (including leap year)

Moonphase complication with northern hemisphere display at 9 o’clock

Chronograph with central seconds hand and 12-hour/30-minute counters

Applied Arabic numerals, feuille-style hands, and a railway minute track for precise legibility

Each subdial is artfully integrated into the layout, enhancing both readability and mechanical poetry.

Base: Modified Valjoux 7750

Functions: Chronograph, perpetual calendar, moonphase, year indicator

This movement is a technological marvel, combining robust architecture with an impressive degree of mechanical integration. All calendar indications are synchronized and can be adjusted via the crown

CONDITION:

This Timepiece is in an Unworn Condition Complete with Box & Papers Accompanied with a full Two-Year Warranty from Date of Purchase and a Full Value Appraisal