Originally designed as true instruments, diving and military watches are built to withstand shocks, friction, and extreme conditions. However, as these timepieces have become objects of passion, collectibles, and sometimes investments, the question of their everyday protection has become paramount. Today, several solutions exist to preserve their integrity without sacrificing wear: transparent protective films applied to cases and metal bracelets, textile or rubber overstraps to limit wear on the steel, and controlled aesthetic maintenance, from regular cleaning to professional polishing. The challenge is no longer simply to ensure the watch's survival, but to preserve its appearance, finish, and value over time, by finding the right balance between practical use and preservation.