This one on the left has dark finger prints like a sms I'm not sure if the one on the right is one. your input would help.
There are a tiny number of SMS coins that were "found" in a former Mint Director's estate. https://www.pcgs.com/news/1964-special-mint-set-coins
^^^^ My point being, is that no one is breaking them up and spending them. They are all either slabbed, or documented etc. Anyone who comes in with a coin from circulation, and says, I think I have an SMS half dollar, it's not possible. I will blame JB Coins, Minister of Propaganda for now.