What is atir O112 on jewelry?

Atir O112 is a hallmark or marking found on jewelry that indicates a specific standard of purity for gold. The "O" typically signifies the type of alloy used, while "112" often refers to the percentage of gold present, suggesting it contains 112 parts per thousand of pure gold. Such markings help consumers identify the quality and authenticity of the jewelry they are purchasing. Always verify the meaning of such hallmarks with a trusted source, as they can vary by region and manufacturer.