The stamp is quite visible in the flick hope this helps Brian. Jeff, that is the original sticker on the firewall. My tune up sticker is mounted on the valve cover instead of the shock tower like many I've seen over the years.
Looks like a service replacement hinge with a date from the 70's (looks like 73 in the picture) . Like the one Brian posted originals were stamped with the date that did not include a year. Seen that stamp before on early NOS hinges. They appear to be painted black unlike the originals is that correct?
Looks like someone freshened up the engine compartment with some rattle cans very typical for owners to do at some point after all these years.
When was the car built if I might ask. It would help relate things like the paint inspector stamp and other details. Guess since you report that the decals are original you purchased the car new.
Though its off thread - the "tune up decal" you refer to is the one with the timing? If so the original spot would be on the valve cover. Or are you referring to another.
My hinge is stamped; OB 9 11 D3. My car was built 9/19/68. Brian
Wow that's tight ... but since it was stamped next door you don't have all the shipping and other things to slow down stuff like they had with parts coming from elsewhere.