Someone else will have to speak to the correct packaging and paperwork as I think it probably changed at least once.
As far as the knife goes look for
jet black delrin handles and larger rivets than on the "new" SMKW knives. Any original USA Schrade SFO PH1 knives with wood handles will most likely have a blade etch or handle shield etc. and not just plain wood handles. A lot of UH167 fillet knives are showing up as well after receiving their new "offshore" handles. They are a bit easier to spot at a glance though because the "new" ones use brass and the original UH167s were all nickel silver.
Link to flyer:
http://www.collectors-of-schrades-r.us/FLYERS/1990s/pages/SC91-007.htm
(not mine but an oldie):