What does 925 stamped on back of cartier watch?

The "925" stamp on the back of a Cartier watch indicates that the metal used in its construction is sterling silver, which is composed of 92.5% silver and 7.5% other metals, typically copper. This stamp signifies the quality and authenticity of the silver used in the watch. However, it's important to note that Cartier primarily uses precious metals like gold and platinum in their high-end watches, so a "925" stamp might suggest it is a less common or specific model. Always verify with official sources to confirm the authenticity of luxury items.