On the other hand, the day dial is marked in Chinese, and the right side of the day is marked in English; The number on the left is used to observe the back cover of Vacheron Constantin watch. All Vacheron Constantin original watches, especially men's watches, must be printed with many English letters on the back cover of the case, indicating the name of Vacheron Constantin watch, the country of manufacture (made in Switzerland), and the name of all-steel or semi-steel waterproof, antimagnetic, shockproof or shockproof device. Vacheron Constantin watches are usually covered with a plastic film. Swiss-made watch with gold-plated case is engraved with letters such as PLAQUEGI0 at the opening of the case (opposite to the spring rod for mounting the strap), indicating that the case is 10 micron gold-plated.