@ss, first welcome to CCF. Second, when I enlarge and enhance this area of your picture, the image becomes pixelated, but I agree that the letter T was changed into a number 7 by a well-placed hit. You can see damage to some of the other letters too.
"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
Keep in mind when looking at potential error coins, the dies do not use interchangeable letters. The devices on coins are permanently engraved into the die. So if you think a coin has an error, keep that thought in mind. The striking of a coin with incorrect lettering can not happen unless it was engraved that way. Which in my opinion is virtually impossible.