1974-D LMC Upper Column Help!

*** Edited by Staff to Add Year / Mintmark / Denomination to Title. Titles are Important! ***

Most of the pictures here I'm 99% sure is MD or Die Deterioration, but my main focus is the top of the columns. I'm not experienced enough to know whether that's worthless or true doubling, but from what I've seen from other years, it looks pretty close. Made sure to look at regular strike 1974 Ds nothing similar so, I Won't get excited or anything but let me know your thoughts and what exactly that is! Thank you.
{Hey at the end of the day thats a nice looking coin :)}