The KA-BAR brand originated as a trademark of the Tidioute Cutlery Company. Tidioute was later taken over & renamed the Union Cutlery Company which continued making the brand until Union eventually adopted it as the company name in 1952. Cutco Corporation later acquired the company in 1996.
They came out in 1979 and were discontinued in 1980. Very short run. No telling how long they sat on any particular retail shelf before being completely out of stock.