I'm from Idaho and we just got back from a detecting trip to Maryland. I found this button but I'm not very familiar with stuff this old. I have Albert's book, but I can't find one exactly like this. I know you folks know everything so I'm asking for your help. Could it be British? There is a circle around the shank on the back but no writing that I can see. I don't really want to clean it much more than I already have for fear I'll lose important parts of it. It's a bird sitting on a fouled anchor, but the bird looks like it has a crown on its head and the wings are spread differently than most of the US buttons. Thanks