Unmarked Brown Drip Stoneware Glazed Bowl Marked “USA” , Pre-Owned

This is a pre-owned “brown drip” glazed stoneware bowl marked “USA” on the bottom. Maker: Unknown Place of Origin: USA Time Period: Uknown Condition: The bowl itself is solid–no chips or cracks. The inside of the bowl shows sign of mineral build up. I believe the previous owner may have used it to hold a flowerpot.