Newbie Ike dollar question

[Jsayre1234]

I was wondering what the composition of the Ike dollars were for what years. Were there ever any 40% silver ones minted? If so what years or mints? Any help is appreciated, thank you. Jon

 

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Get a Red Book or check out this site: http://www.coinflation.com/silver_coin_values.html

 

[Jsayre1234]

Thank you! It is only the ones with the S mint mark in the years from 71-76 that were 40% silver.