1968 No S Dime ? Please Confirm

From CCF US coin facts-
Roosevelt dimes have been coined at three mints: Philadelphia, Denver and San Francisco. From 1946 through 1964, the mintmark location was just to the left of the base of the torch. From 1968 onward, mintmarks appear above the date. Those struck in Philadelphia carried no mintmark until a letter P was introduced beginning in 1980. Roosevelt dimes coined at the mints in Denver and San Francisco have always been identified by letters D and S, respectively, except during the years 1965-67 when these mintmarks were omitted. All three mints made dimes for circulation through 1955; in March of that year, San Francisco ceased the minting of coins, and for the next ten years its mint was used exclusively as an assay office. The other two mints continued alone until 1965, when the West Coast facility was reactivated in an effort to overcome a nationwide coin shortage. Silver dimes dated 1964 and carrying no mintmark were struck in San Francisco during the last months of 1965.

here is correct 1

Your dime is a Philly dime,not missing the S mint mark.
John1

Thanks so much