Does anyone know what these lines are? They appear to be raised and I don't see anything that would indicate heat damage. Images from a sale a few years ago:
I don't think it's a die crack because, a) it seems to wide and, b) it doesn't have a die crack travel path. Die cracks usually connect to the corners of letters and such, but whatever this is goes past design element without changing it's course. Unfortunately I can't compare it to other examples because this is currently the only one known.