The Osborne 670 was Benchmade's first (locking liner) assisted folder. By means of a steel torsion bar, easily removable, the design did work but the knife, IMO, was much better as a manual opener. When I saw my first example it was a solid and beautiful knife. My favorite version was a limited edition of 500 black bladed Micarta handled, and I regret moving it along at some point. It was, compared to the 940, not a hotly sought knife, but was a good one.