[JoeDfan]

Some (not all) pro model bats can be distinguished by a model number on the knob, or the presence/absence of inch notations or whatnot. It varies by era, manufacturer, etc.

If you just plan on collecting this one bat, you are all set, you know what it is.

But, if like me, you start to become addicted to collecting bats, do your research and start learning everything you can about them. The smallest detail can be the difference between a real gamer, and a store model.

There is a great book by Vince Malta on Louisville Slugger bats; if you turn into a bat collector, this is a MUST have, along with a few others.