This was a trivia question that I answered when I was in high shool(1969). Tha answer is "black betsy". A lot of people knew that it was called betsy, but The Babe always referred to his bat as Black Betsy because of its' color. I won trivia book which I still have today, that contains the answer. OK it's your turn give us a good one, like Johnpoker says, you can find anything on the internet now-adays.