It might be a die crack, but clearer pictures may be needed. Die cracks don't seem to add much value to coins (maybe a dollar or two) but I still find them interesting.
Not sure if this makes a difference or increases the value but if you have washing tons head facing up on the front the back side is almost completely upside down
That is normal. Still not 100% sure about the die crack, maybe someone else with more experience in errors can take a look?
I'm with Chris, almost looks like a scratch to me but better (if possible) pictures would be nice. Welcome to CT also!