See following item #869 for coin information. This example was struck at the Denver Mint, and is the key date of the series, w/a low mintage of just 264,000 pieces. The low mintage is because in Nov. 1916, the three mints were informed of a large order for quarters, and instructed that Denver strike only quarters until it was filled. Striking of dimes at Denver did not resume until well into 1917, making the 1917-D relatively rare as well.