I found a Balisong recently that I misplaced for a while- I was trying to find out what model it is, is there anyway to identify it from just looking at it? It only says Benchmade USA, Bailisong and has 2nd on the blade. I got it in trade from a friend a few years back, he doesn't remember what model it is. Trying to figure out if it's something I should sell or just keep. Thanks in advance!