My Dearborn 65 Fastback has a production date of 18T and has a 66-style decklid. I have owned the car since 1977 and it had one repaint over the original factory paint in 1976. No jambs or inside the trunk were done and the spare tire sticker was still intact as well as the bolts still having undisturbed paint on them. The date stamp is 6 13 D3 on the lid. When I disassembled the car for restoration 3 years ago, I elected to leave the decklid on the car and just scuffed the paint to leave the bolts undisturbed. When the exterior was stripped, the paint/primer strata matched the surrounding panels The car has no evidence of repair from damage and retains all of it's original sheet metal inside and out except for the hood.
My question is, have others like this been observed on other unmolested cars? At this point since the car is done concours, I am not going to 'break the seal' by loosening the bolts to check for paint under the hinge.