This up to date-awesome design encompasses a self-winding movement driven via the motion of the wrist without having for batteries, displayed with an exhibition caseback. A matching yellow gold ion-plated stainless-steel bracelet completes the design. This version appears to be virtually identical to the initial Heuer Monaco, released in 1975, https://www.watchesworld.com/exploring-the-aesthetics-of-dial-design-and-decoration/