This thread made me start thinking about that Original LM so I started digging and found it right I put it who knows when. It isn't stamped "PST", it just says "LEATHERMAN TOOL". I wonder when the PST nomenclature was added; probably about the time Mr. Leatherman decided there would be more than one model. After all these years I was pleasantly surprised when I opened it at how smooth it felt -- very nicely fitted/polished. The Fuse is nice but a bit gritty in comparison.