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The "S" mint mark indicates it was struck in San Francisco. Since the mid-1970s San Francisco has only struck coins for inclusion in proof sets sold to collectors.

If your dime is still in its protective package it's worth about 40 cents. If it was found in change someone took it out of its package and spent it, which means it effectively has no extra value. Still, it's not every day you find proof coins in circulation so it would at least make an interesting conversation piece.

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16y ago

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