I popped into my local junk shop and happened upon a couple of SAK's, one is a hard-worked SD Classic (it looked lonely so I had to give it a new home) the other I thought was a Standard. I based this on the same tool set as the Spartan, but no key ring, toothpick, or tweezers.
However, I have a niggling doubt. All the Standard's I have seen had a 5 twist corkscrew with the grove and no 90 degree stop on the bottle opener.
This one has a 4 twist corkscrew with no grove and a 90 degree stop on the bottle opener.
It has Scale has FISHER-ROSEEMOUNT on it, who I believe started business in about 1993.
Any ideas what model I have ?