Okay, opinions on this. PMD or DDO? The 5 looks like it has the original there with an extra one to the side.
If it is only the 5 then it looks like PMD! The 5 took a hit and spread open a little!! You can see how the 2 was flattened a little also!
If it helps, there is something interesting about the 1952 Lincoln penny including the overmintmark (OMM). http://www.coin-collecting-guide-for-beginners.com/rare-wheat-pennies.html