What does c m mean inside a gold bracelet?

The "c m" marking inside a gold bracelet typically indicates the bracelet's gold content or purity. "C" could signify "carat," while "m" might refer to "millésime," a term often used in jewelry to denote a specific quality or standard. However, it's essential to consult a jeweler for accurate interpretation, as markings can vary by manufacturer. Always ensure the authenticity of the gold through professional assessment.