Dear Babe: I bought a Roy Campanella autographed baseball bat at a public auction several years ago. The signature is clear and bold on a new bat. As you can see, it also came with a certificate of authenticity from Coach's Corner. The auction was held in 2007 at the Crowne Plaza Hotel in Nashua, N.H. The auction company was Federal Auction from Gaithersburg, Md. Coach's Corner did not organize the auction. The auction had only a few sports items.