What does 401 mean on a sterling pin?

The "401" mark on a sterling silver pin indicates the purity of the silver used in the item. Specifically, it denotes that the pin is made of 41% silver, which is a lower standard than the typical 92.5% silver content found in sterling silver (which is usually stamped as "925"). This marking suggests that the item may not be considered true sterling silver, and consumers should be cautious regarding its quality and value. Always verify the specific context and manufacturer details for accurate identification.