Night Owl Cards

I wondered a few things about 2017 Heritage in last night's post : Why is Oakland's team listed as "Athletics" when they were listed as "A's" in 1968 Topps? Why is there so much space above the players' heads in the league leader cards? Why are so many players posed as if they just launched a 600-foot home run? I don't know if I can get answers for all of those, and I may have guessed the right answer for one or two already. But research always sheds at least a little bit of light on many questions, so I applied a small amount of research to one of my wonderings: What is with all the clouds and bright blue sky? In acquiring just 70 cards from the set, I pulled at least 15 sky-blue-wispy-cloud backgrounds. That seems like quite a bit for such a small sampling. How about two more? So with so many I wondered whether '68 Topps also featured many "it's a beautiful day to play baseball" cards. I also wondered d...