All the doomsayers here will now tell you it is not numbers matching, DAMHIK! I have seen several cars with either no core support stamp or trunk stamp, usually will have one or the other, never seen one with no stamps 69-up. It may be so light you won't see it, or they might have left it off. Some are so faint that you need to take the rail down to bare metal and still use an led light to see it!
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
I have seen several cars with either no core support stamp or trunk stamp, usually will have one or the other, never seen one with no stamps 69-up. It may be so light you won't see it, or they might have left it off. Some are so faint that you need to take the rail down to bare metal and still use an led light to see it! 
