If anyone has this 8/20/74 SCD then we may find an answer quickly as the set in question is advertised in the issue.
At any rate, the cover shows seven Hank Aaron postcards from a larger set of 12 issued in 1974 by a dealer in California.
I have all seven.
The problem is I also have seven others! Per the PSA set registry the five I’ve circled complete the set. (This is probably wrong since the color one is a different size and has a completely different back.)
But even if we cross off the color one we still end up with 13 b/w postcards, all identically sized and backed.
So the question is - Are there 13 (or even 14?) cards in this set? And if there are only 12, which are the right ones?