Grande Complication

About this item

• Brand: IWC
• Collection: Grande Complication
• Model: Grande Complication
• Reference: IW3770

IWC Portugieser Grande Complication Ref.3770 is a men’s automatic‑winding luxury watch, crafted in precious‑metal case of 42.2 mm, limited‑edition of only 50 pieces and ranking among IWC’s most prestigious haute‑horlogerie masterpieces. Powered by in‑house Cal.79091 automatic movement with 68 jewels and 44‑hour power reserve. It integrates four elite complications: minute repeater, perpetual calendar, moon‑phase and chronograph. The slide‑trigger on case‑side activates sonorous gongs for striking hours, quarters and minutes. Its perpetual calendar automatically adjusts for leap‑years, while the ultra‑precise moon‑phase deviates merely one day in over 500 years, with 10‑metre water‑resistance and sapphire crystal. The multi‑sub‑dial dial delivers comprehensive time‑related data, paired with black alligator leather strap and precious‑metal buckle. As an iconic milestone of IWC watch‑making history, this ultra‑rare vintage grand complication boasts remarkable collectible and investment value. IWC Portugieser Grande Complication series Ref.3770 men's automatic mechanical watch, 42.2mm precious metal round case, limited to only 50 pieces worldwide, belonging to IWC's hall-of-fame-level super-complication works. Equipped with the Cal.79091 in-house automatic movement, 68 jewel bearings, power reserve 44 hours, combining the four top-level complications of **minute repeater, perpetual calendar, moon phase and chronograph** in one; a slide lever on the side can trigger the minute repeater mechanism, with melodious gongs striking the time; the perpetual calendar automatically recognizes long and short months and leap years, the high-precision moon phase only produces a one-day error after more than 500 years, 10 m water resistance for everyday use, sapphire crystal. The multi-sub-dial layout makes the dial information rich and clear, paired with a black alligator leather strap and precious metal buckle. As a pinnacle work of IWC's modern watchmaking, its production is scarce and its craftsmanship substantial and meticulous; it is a vintage complication watch highly sought after in the collecting community, possessing extremely high collectible value and appreciation potential.

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