1967 Baseball Blank Backs / Proofs

rbmn

I don't see much discussion on 1967 blank backs. The grading companies won't grade because they apparently not able to authenticate. Here are the four that I have and they are authentic from 1967 unless someone was in the business of creating forgeries from before 1978 when I acquired them from a friend at the age of 13. I did not open the packs in 1967 but I believe they were found in packs, opened by my friend. Just wanting to let others see the examples.