Any ideas on what this perferated copper piece was used for? Almost looks like a coin purse, but, it's way too stiff for that. You can bend it by hand, but, not easily. I spread it open a bit to get some of the dirt out. It was flat when I found it. At first, I thought it might be a drain strainer, but I don't think it was ever round. The way it's made looks more like the coin purse shape is correct. Basket? Filter? Strainer? 
