1988 Quarter Errors Word Backwards On Quarter

@Chrishutson, first welcome to CCF. Second, normally when we see this, the fact that the letters are backward is a very good indicator that someone squished another coin with this one in a vice, thus transferring some of the design. The lighting on your pics is a little dark right at 9 o'clock which seems to be a prime area for these additional letters. In addition to posting a pic of the front, can you please also try to get a better lit shot of this region on the back? Thx.

but

It looks like a vise job, so just damage.

A vise does add all devices from another coin:

Your coin was probably placed between two pieces of wood with another coin, then hit hard with a hammer. Thus the only transferred was where the hammer head hit one coin into another one. ( good catch on that question. It shows me you are a thinker)

on the hammer theory. Only transferring that area of the coin.
People have too much time in their garages.