1977 by MSA. This set makes a unique and hard to find addition to anyone's baseball collection.
BONUS: As a free gift for purchasing the 2.5 inch complete set, I am including a complete set of the 1987 M&M
"Star Lineup' series. 24 total cards, each card is still attached to its counterpart.
I AM DOWN TO MY LAST SET OF 1976 MSA 2.5 Wiffle Ball Discs.