Easy. First off, they do not strip them. They simply dip them. The resulting coin will have no luster. Also, the original planchets were punched from a galvanized sheet. The edge of the coin was never galvanized. The reprocessing dips the entire coin including the edge.
I figured as much. One of them does look like a re-punched mint mark and some doubling on the date though unless those are my eyes deceiving me due to the dipping. Oh well. They were free. Thanks.
