A couple of items from my minor league official game ball collection I'm especially proud of:
Probably the pride of my collection, a 1939 Pacific Coast League ball.
And one with a story, a 1962 Three-I League ball, Ken Blackman, President:
Except Ken Blackman was never president of the Three-I League. Blackman had signed on as president after the 1961 season, but the league folded. I don't know how many of these balls even exist.
And one more, a Warren Giles National League ball with Western International League stamped on the side. Robert B. Abel was president of the WIL from 1946-1952, and Giles started his tenure in 1951, so this is either a '51 or '52 vintage. (I need a better picture, the stamping is somewhat faded but the glare in the photo makes it appear worse than it is.)