Vintage 1970's Pee Chee all season portfolio 2 pocket folder
2 Vintage '60s PEE-CHEE All-season portfolio $0.10 folders #7500 Westab Hytone
Vintage Pee Chee Folders All Season Portfolio 7500 & Campus Characters 1960s Lot
The folder in question, is the one with female tennis player, two football players, and the running men.
According to this site it was Francis Gordon: