Jimmy...
That is a GREAT ensemble! Those posters are the thing I remember most as a kid (aside from the Topps cards). I had collected every one, and now they're all gone. I still remember amassing about 8 of the Max Alvis posters before finally completing the set. Had at least 5 Don Drysdale and Frank Howard posters as well.
The next year (1969) it was the Topps Team Posters with the players heads inside the circles. That would be another nifty 3-piece set to acquire (Poster/Wrapper/Box). Sad to think that mine all ended up in some dumpster