Interesting doubling on reverse of 1968D

Below are photos of the back of a 1968D LMC.  They don't match any existing DDR varieties and my suspicion is that they are simply die scratches / gouges, but I figured I would get a second opinion.  Though not photographed, I ran across another 1968D that had similar, though weaker vertical lines inside the right-most column as well.

Note the apparent doubling inside the right
most column.

Though difficult to see, there is raised area akin to
a rotated punch of the vertical bar in the 'F'