Looks like post mint damage. There are nothing with the normal minting process to made that type of mark. Looks like a reeded coin like a larger coin with the rough edge was moved into the coin (Bag marked/Squeezed with a vise/or coins struck with a patterned edge could have made that mark. Definitely not a mint error. (Reeded coins are ones with the edges with groves. Dime/Quarter/Half dollar/SBA and large $1.00 coins.) Hope this helps.


















