Certina 25-65/25-66 stem 401

Certina

Founded in 1888 by Adolf and Alfred Kurth, Certina is a Swiss watch brand known for its robust and sporty timepieces, particularly those featuring its DS" (Double Security) concept for enhanced shock and water resistance. The brand has a strong association with motorsports and diving. Famous models include the DS Action Diver, DS Podium, and DS-2, all embodying durability and precision. Certina primarily uses reliable ETA movements, often with custom finishing or Powermatic 80 enhancements, ensuring excellent performance. Certina continues to offer high-quality, resilient watches for active lifestyles."

Stem

The stem connects the crown to the movement and allows the user to wind the watch, set the time, and adjust functions such as the date. It is an important part of the keyless works and must match the movement and crown correctly. Stems are often replaced when broken, worn, cut too short, bent, rusted, or missing.