The Omega Genève Dynamic is an icon of late-1960s avant-garde design, born from an ergonomic study to create a watch that perfectly mirrors the anatomy of the human wrist. This Reference 166.039 features the iconic elliptical "Jumbo" case, a masterclass in aerodynamic styling that won the 1969 Swiss Industrial Design contest. Unlike standard vintage watches, the Dynamic utilizes a "Unishell" monocoque architecture, meaning the movement is accessed through the front of the case to maximize structural integrity and water resistance. This specific model is powered by the highly regarded Calibre 565, a 24-jewel automatic movement from Omega’s most celebrated era, famous for its sophisticated "pull-push" quickset date mechanism. Paired with its original integrated stainless steel bracelet, this timepiece is a definitive piece of industrial art from the "Space Age" of watchmaking. Brand: Omega Model: Genève Dynamic I (Date) Reference: 166.039 Year: Circa 1969–1972 Movement: Automatic with Quickset Date (Calibre 565) Case Dimensions: 41 mm x 36 mm Case Material: Stainless Steel (Unishell) Bracelet: Original Omega Integrated Stainless Steel (Ref. 1153/138) Dial: Two-tone / Sunburst finish with date aperture at 3 o'clock Glass: Original signed Hesalite / Acrylic Functions: Hours, Minutes, Sweep Seconds, Quickset Date Box/Papers: Not included The "Jumbo" Dynamic remains one of the most recognizable designs in Omega’s history, prized for its exceptional wrist presence and forward-thinking ergonomics. While many Dynamics are found on replacement leather straps, an example that retains its original integrated steel bracelet is increasingly rare and highly sought after by collectors. The combination of the bold, sporty aesthetic and the reliable Calibre 565 movement makes this 166.039 a versatile daily companion that embodies the optimistic spirit of the 1970s. It is an essential acquisition for any enthusiast of mid-century Swiss horology.