Looking for advice: 71 Demon 340,4spd, AC, original metal car

Can you please PM the proof. I've studied and built nothing but Demons for the last 17 yrs and all the documentation I have states the thin line should be there. I'm always looking to learn and update my references so please me your docs that show otherwise. Thanks!
I've got you beat by 6 years on Demon research. my demon did not have the thin border line I've seen others as well not sure why, most had the border but some did not, maybe the factory was looking to cut time out or there was a certain percent with borders that came out messed up but my car was owned by one of the moderators of this site in 1973 it wasn't repainted till 1980. this pic is from 1975. original paint.