1922-D Lincoln, No D, Strong Reverse, Die Pair 2 Front
There was a damaged die at the Denver Mint that resulted in coins that did not have a mint mark. Even though most unmarked coins were made in Philadelphia, the Denver mint was the only one that made pennies in 1922. This was how 15,000 to 20,000 such coins entered the circulation.
1922-D Lincoln, No D, Strong Reverse, Die Pair 2 Back
But how come the image on one side is much sharper than the one on the face side? You will probably understand once we tell you that the back side was made with a fresh die. That explains the difference in clarity and quality! A red coin in great condition fetched a whopping $63,000 in Baltimore in 2018.