Apostle Islands Partial Collar W/Break

My father passed last month,in the year leading up to his death him and I really bonded thru coin collecting and searching. He wasnt sure what to look for,but he looked just as actively as I did. This was one that he found,and it means the world to me tbh. You can see the collar getting smaller and smaller until it finally breaks. The coin is in great shape and the error itself is super neat to see. I had never found one...but...i didnt have to,like father like son.Cheers