The maddening part is that there don't seem to be any records of just how many variations there are. In my picture there are first generation but not PIG marked, what I believe to be a factory black finish but it could be aftermarket, uncoated aluminum, Tufram coated aluminum with and without lanyard hole, ATS-34/Titanium, saber grind/G-10 without liner, flat grind/G-10 single liner, Carbon fiber, a rather beat up old left hand model in ATS-55 and one P3. Steel marks include none (early models weren't marked), G2, GIN-1, ATS-34, ATS-55, and VG-10. The lanyard hole seems to appear and disappear at random. I was trying to get plain and serrated of each steel mark and handle material, but I've only managed a couple of pairs that way.
I don't believe in safe queens, only in pre-need replacements.