What does 890 AR stamp mean?

The "890 AR" stamp typically refers to a hallmark used to indicate the purity of silver, specifically that it is 89.0% pure, or 890 parts per thousand. This designation is common in countries that follow the metric system for measuring precious metals. The "AR" can denote the specific assay office or manufacturer responsible for the item. It's important for collectors and buyers to understand these markings to ensure they are purchasing genuine and high-quality silver items.