Dated model 22 BUT, it is a separate "S", so the blade was forged a couple years earlier than the sheath depicts. 1974 would be correct time period for three thick two thin non-leather handle. Plus, note the crow's beak handle without butt-cap!!! I have never seen one like this, ever. To top it off, the thing hole is unlined!!

the stone "pouch" on the back of the sheath?!? Shut the front door. Actually, the stone is just stuck in there. It seems to be a method to attach the knife to say a strap to a back pack or something of that nature.

https://www.ebay.com/itm/Randall-made-knife-1974-B-3/132576703201