The green cards? (http://1.bp.blogspot.com/_ExvrQDJkWXU/TIFtE7L-jLI/AAAAAAAACwY/0C--tfScZLc/s1600/75+football+scratch+off.jpg) They were inserted with the regular base set (heck in the 70s the base set was the "only" set). OH it looks like they are already there (just need front/back scans):
http://www.tradingcarddb.com/ViewCard.cfm/sid/3226/cid/9937789/1975-Topps-NNO-Scratch-off-Game-Piece
I collect: Baseball, Football, Hockey, Mostly Vintage pre1980, My Homie teams - Washington/Baltimore Teams Senators (Twins, Rangers), Expos/Nationals, Redskins, Capitals, Bullets/Wizards - HOFers - Non-sport (mostly TV shows and movies).
My Trade List is very much a work in progress
CaptKirk42s Trading Card Blog Curly W Cards Strive For '65 YouTube klandersen42