Cartier Must Tank Pre-Must Tank LM White Roman Dial, Working This is a rare Pre-Must Tank, a cult favorite produced only for a few years before the Must Tank was created. The version with the bullet-shaped crown, typically used in the high-end lines, is particularly unusual. ☆Condition There are some wear and tear marks, but the watch functions without any problems. ☆Size (mm) Case width (excluding crown): 23.5 Strap width: 17.5 ☆Color White Roman dial x GP case Original buckle Lizard belt (third-party)