I have a bunch of these but never had one looks like this one on the date and mint mark. See what you guys see there or my eyes are playing tricks.
Not the best looking coin off the day but I believe that the date and mint mark is something wrong with it.
The outside 9 took a hit from a rolling machine finger. That's what smacked it inward like that. We see it from time to time, and it's just damage. On the mint mark, see if it looks like one of these... https://www.coppercoins.com/diesearch.php
There are several for the date and mint, check against these http://varietyvista.com/02b LC RPMs Vol 2/RPMs 1959D.htm