Hi all! Found this quarter in my stack of watermill quarters & decided to keep it. What category would this quarter (pictures below) go under?
Partial missing clad layer, but looks like it had help as the exposed clad looks like it has dimples on the surface. Could have been a gas bubble and someone toyed with it to remove, or maybe came off naturally. If part of the clad was peeling but the copper wasn't exposed, it would be a lamination.
Thanks! I thought it was a gas bubble. The head also has a bit of dimples. So it's Corrosion: gas bubble