Hi i would get a 15x loupe to look at edge to see if you can see an copper color. There 40% are silver clad, But there are some 1965 that are 90% silver there is only a hand full and very rare they can bring about $7,000.00 to $12,000.00 There are know sliver 1965 dimes and quarter and the sell for a lot. I know a guy use to have a dime and got 6,000.00 for it.