That's a hard question to answer and to be honest, I have not even thought about it. But now you're making me think about it and there are 2 that stand out in my mind. Of Tony's my pick is the 2 blade swayback jack just like the one that He donated to the Nat. Knife Museum. Of Reese's recent ones I have to go with the Rogers Whittler with buffalo horn handles. I would lean harder towards that whittler pattern though.