My guess is these two coins spent a LONG time being tumbled in a clothes dryer. (Who was it that said it was impossible to spoon a cupro-nickel clad coin?)
Based on your comment I rather think you KNOW who said it. Be that as it may, I personally spooned several clad coins in my youth. So I know for an absolute fact it can be done. Will however readily admit it did take forever and it is much easier with a silver coin.
That is very cool I am going to have to give it a try would make a nice conversation piece to have sitting around. Ice
I have made a couple coin rings from clad halves and quarters and they turned out fine. They are a little harder to work than 90% silver but it can be done. The biggest drawback is they turn your finger green. I actually tried to solve that problem on the Sac dollar I did for my daughter. I gold plated it when I was done. I'm curious to see how long it lasts.
Andrew, You don't learn if you don't ask. As the name of the term implies, "spooning" a coin is typically done by tapping the edge of a coin with a spoon. (Some people may used a small hammer to speed up the process.) It takes a LONG time but eventually the metal along the edge of the coin is moved inward creating a ring (after the center plug is removed). 90% silver coins are usually used to be spooned into rings.