Basically it is a 3 layer Yeoman with a saw layer added. There are no backside tools except for the Corkscrew, and it does have plus scales and all of the goodies that go along with them.
I don't see anything on SAKWiki about it and I'm guessing it's a mod- maybe a Scibeer Bill one?
All of this is speculation as I don't recall when I got it, how or where it came from, and I was wondering if any of the old SOSAK crowd might? Long shot I know....
Def