An icon of 20th century watchmaking, the legendary Patek Philippe Nautilus reference 3700, here in the highly coveted steel and 18k yellow gold configuration, powered by the renowned automatic calibre 28-255 C. Produced in 1977 during the earliest years of Nautilus history and sold a full decade later in 1987, this example represents a rare opportunity to own one of the most significant and hard-to-find executions of this Gérald Genta masterpiece. The integrated case and bracelet, flawlessly alternating between brushed steel and solid gold, give the watch its unmistakable Nautilus character, sporty yet effortlessly elegant. The striking black dial, with its horizontal embossing, applied gold hour markers and perfectly framed date window at 3 o’clock, captures the understated luxury that has made this model a cult classic among collectors. Recently given a meticulous professional polish, the watch now presents in truly exceptional condition, retaining its crisp lines, perfect hallmarks and the sharp, clean transitions between satin and polished surfaces. Accompanied by a Patek Philippe Extract from the Archives, issued in 1999 and confirming both production year and sale date, this watch comes with unimpeachable provenance and historical authenticity. The reference 3700 is widely regarded as the cornerstone of the modern luxury sports watch genre. A timepiece that needs no introduction among connoisseurs. This particular example, combining early production, the highly desirable two-tone aesthetic, flawless condition and documented heritage, is a truly rare chance to acquire one of the most important Nautilus models ever made. A watch that will only become more significant with time.