I’m new to collecting, so I normally have a lot of questions, but then assume what I have is something basic.
If you are talking about the indentations around the edge, that is just signs of a hard life, what is called PMD or Post Minting Damage. Not an error but welcome to CT.
We all get a little rough around the edges when we get old.... Still is a cool little piece of history you got there. Welcome to CT.