JumpFame,

I'm not sure why you would need a letter in addition to the one provided by Lampson. However, in addition to Lou, I have heard that Willy Steinmiller is tops. You can learn about him at:

http://www.americanmemorabilia.com/Authentication.asp

Several months back, I would have recommended Lon Lewis (also highly respected)... but I'm not sure he is available to do authentications any longer (if forum members have additional information, please share it).

Good luck,

Reid