Best to just keep as is and put in a pvc free plastic bill holder. It’s not worth your cost to certify it.
Afraid it’s damaged Mari. Any soaking and scrubbing will make it worse. Soap is abrasive, even liquid soap.
Sorry but those coins are stained and damaged. Welcome to CT.
Welcome to CT. You’ve started correctly by doing some research. You’ll need to do a lot more in the future if you stick with it. Sorry to hear...
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