I've included a link to the evolution of the baseball bat. I think it's an interesting read. I would like to hear other ideas or questions about bats as well as your pictures and any information not included. Here are a few different bats from the 1900-1920 era that are unusual. There's a double knob Lajoie, ball knob, and a mushroom bat.http://www.stevetheump.com/Bat_History.htm