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Tool4work
The first PST II had "Leatherman Tool" stamped on the handles, like the regular PST.
From 1998 on it changed to "Leatherman PST II".
So I assume yours is from 1996 - 1997.
But you can check that yourself.
There is a 4 digit date code stamped into the inside of each handle. Just lift up all the implements
What does it show?