Bought this 1959 mobil sign at an amish auction. It has 4 holes (about 3/8) drilled in upper half of sign precisely located about 2 feet apart. You can tell these were not hand-drilled, but rather drilled by a press or something (due to the precision of the holes). If you look closely, you can also see what looks like an impression in the paint around the holes of some type of bracket or something that previously was mounted on sign. Any of you Mobil Boys know what these holes are for? Could it have been a set-up for neon?