In looking at eBay, Gerber reviews and their website, it seems that there have been several variations on the 600 series over the years, with the Scout, Pro Scout and Fisherman to name a few. It seems that over the years Gerber has been varying the array of tools found on the 600, both in form and function. Now, I'm not a Gerber person, in fact the only thing I own of theirs is an AR 3.0 and the Artifact, but it seems that the 600 is certainly their flagship model and one of the few that has given them steady success. So, much in the the vein as we did with the PST, is their a sort of "time-line" for the 600? Do any of you major Gerber collectors have several 600 models because they are all different? I'm curious to know more.