The 1968-D Washington Quarter has the lowest mintage for any circulation strike Quarter struck from 1965 to Date. Although it has the lowest mintage it is still fairly common and examples can still be found in circulation. Uncirculated examples can also be purchased inexpensively up to MS65 grades. In MS66 grades examples are usually pulled from rolls or sold as singles. in MS67 condition they are scarce with about 200 to 300 examples known. In MS68 condition they are almost unheard of with less than a dozen examples available and none being graded finer.