I'm sure the exact age or origin looks to be handmade. Somewhere discoloration dirtiness and staining from Storage some corrosion to the bottom plate, rough hewn edges sharp in areas. We believe it to be a base for a fountain, garden water feature, birdbath or the like. Any clarifying j for greatly appreciated. Yes we know it looks loke.a hubcap. Measures approximately 18 inches in diameter 7-in diameter bottom cap see pictures