Appears to be PMD or Post mint damage . Or while being transferred from mint to the Bank . Hard to tell for sure .
Not your question, but many people think there is doubling on some of the columns. The columns near the center and at the edges have other columns or building parts behind them so that's the design as intended.
Hi Barbie, Here are some websites that will help you learn more about errors and varieties! http://www.lincolncentresource.com/index.html Variety Vista Home Wexler's Coins and Die Varieties (doubleddie.com) I recommend you visit them and start your journey into the world of errors and varieties!
