In my home state of California, I only got the 1975 Topps Minis - a set, which if I understand it correctly, "...was identical to the regular issue with the exception of size and distribution." (Read here). I've been told that the "distribution" part of it was limited to certain states; I was living in Sacramento at the time, and like I said, I only knew about the mini set then - I never bought, nor saw regular-sized cards.
Anyway, Ken in Missouri has been funneling some amazing stuff my way in trades. He sent me these five winners and I got them yesterday. I'm going to collect this set someday; they're the coolest. Also loving the David Clyde card - this guy was the #1 pick in the draft and is famous for an early flame-out (and for arm troubles, in an era when nobody really watched for them).
Here are the others Ken was kind enough to send me: