This is the first year of issue and the first Roosevelt Dime struck at the Denver Mint. This year the Mint struck a little over 340 million coins between the Philadelphia, Denver and San Francisco Mints combined.
Most of the 1946- D Dimes are not considered scarce in circulated grades including up to MS64 grade. Only in MS65 grade and higher do they begin to be somewhat scarce but yet, still easy to find with most of them being raw. Since they don't command a premium in grades of MS65 and lower, most coins are still raw. In MS66 grade they become a bit tougher some of them are still raw but many of them may now be in holders. In MS67 grade they are very tough, possibly no more than 300 examples exist in this grade or higher.