Vintage watch with a 10-minute countdown timer for sailing regattas and surfing. The Memosurf is a vintage watch, typical of the 1980s and 1990s, known for having been designed by Memotime in collaboration with Corum. It is closely related to the famous Memosail model, a regatta watch, but with a specific focus on surfing and water sports. "Bullhead" layout: The crowns are not traditional; they are positioned on the top of the case at 11 o’clock (red push-button to start the countdown) and at 1 o’clock (green crown to set the time). Regatta Timer: The dial features 5 rings that change color (from blue to red to black) during the 10-minute countdown. Materials: It often features brightly colored cases (yellow, green, orange) made of carbon fiber or fiberglass, paired with rubber straps. Dimensions: The case is usually about 40 mm in diameter and 10 mm thick. Movement: Ronda 883 quartz (or Ronda-Harley 775) with a separate complication module for the countdown.