The light was about gone here when I shot this. Top to bottom: ATS-34, CPM 440V, BG-42 and CPM D2. The first two have the old style jimping, the last two have the new style. As far as I know, the steel order was ATS-34, 440V, S30V, BG-42, CPM D2, with S90V coming soon. Sorry I can't help with dates, I've only been doing the Spydie bit for the last couple of years.