Experience the craft of Girard-Perregaux in the 1966 (ref. 49551-52-231-BB60), a contemporary classic shaped by careful watchmaking know-how. The exterior is thoughtfully executed: crafted in pink gold and measuring 44 mm in diameter, with a thickness of 9.82 mm, defined by a round silhouette. The caseback is open, and the crystal is sapphire, delivering water resistance to 3000 meters. At a glance, the dial balances texture and clarity: a brown tone with guilloche finish, framed by stick / dot hour markers, and feuille hands. Among collectors, it is nicknamed "Brown". At its heart beats a proven engine: the GP01800-0004 caliber. With considered ergonomics, it feels composed during extended wear. Brushed and polished elements play with light to emphasize crisp geometry. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.