There are only two no S Proof times known for that year. So either yours is the third or it's not a proof. It certainly does not look like a proof from where I sit. As for the other two, no mint mark means Philadelphia. What do you have here is $.30.
📋 Item Submitted
1975 no mint mark maybe silver high etch in torch flame not sure if it’s aproof
M
Marc's Expert Appraisal
ANA-Certified Numismatist · Hudson Valley Numismatics
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