Posted By:
Dan BrettaThere is a Mastro Bat Guide that was put out by Dave Bushing a few years back and I think it's available through Mastro still. It contains a dating guide for bat labels. I don't think it will tell you much for minibats though because I doubt they changed the label for their minis at the same time they did for their regular bats. But I bet when you post your pics you will get an answer pretty quickly as there are mini-bat collectors that frequent this forum.