I figured since today is 7/11, I would salute the store that many of us bought our Wackys from back in the 70's. Many of us rode our bikes to 7-11 to get our beloved Wackys.
I'm sure I told this story before, but back in the 70's, one time I found a Wacky display header card at 7-11. It was about 2' x 1'. I think it was near the dumpster on the side of the building. For some reason I couldn't take it home at that moment (probably cause I had hold onto my slurpee while riding my bike home), so I buried it under some leaves under a nearby bush. Funny even back then I was thinking about saving stuff like that... So anyhow, I promptly forgot about the header card, and by the time I did remember, it had snowed several times, so probably disintegrated the poor thing.
My recollection of what it looked like has faded over the years, but what I do remember is that it was on heavy cardboard, and mostly white. I also think it had die cut upper area around the Wacky images, like the display box. I mostly just remember the Wacky images, no words on the header. But I can't image it wouldn't have the Wacky and Topps logo.
So for fun, I modified an image of the 1st series box top, turned it white, and made a few other mods to come up with what I think it looked like. Wish I could find out from Topps if they have records of the promo ad material from back then, to see how close I am