I'd assume some of the knife kits were assembled and finished at S&W as prototypes, and some of the kits probably did get sold to the public.
The kit knives were made by S&W in Springfield, MA. in the 1970's along with these knives.


The example you are looking at appears to have been put together by someone who knew what they were doing and $100-$115 would be a fair price.

KO