@Cmancelet, first welcome to CCF. Second, a picture of the back of the coin (showing a flat spot or distortion corresponding to the dimple) would confirm, but I feel confident that this damage occurred after the coin left the mint.
"If you climb a good tree, you get a push." -----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz