The circulation strike 1964-D Roosevelt Dime has the highest mintage for any circulation strike Silver Roosevelt Dime produced by the U.S. Mint. It's mintage is also the only one that surpassed the 1 billion mark in the series, as over 1.357 billion 1964-D Dimes were struck.
Despite it's large mintage, coins in MS67 and higher seem to be difficult to find. MS68 examples are almost unheard and probably less than a dozen exist with none being known in better condition.
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