This is a very large Dagger Blank for making your own knife. It came in from a collector that bought it from Blackie Collins , who made it in the 1970`s. There are no markings or stamps on the blade and no paperwork for proof of this. It is made of 440C. The OAL length is 19 1/2 " ,Blade : 11 ", the width of blade is 2". It has been heat treated. 

Blackie Collins designed the bowie/survival knives series for Smith & Wesson in 1971 and was involved in designing their commemorative knives from 1971 to 1978. In the late 1960s-early 1970's he also made knives under the name of Blackie Sewell and had a shop in the original Underground Atlanta. In 1981, Collins' designed a knife for  Gerber Legendary Blades named the LST (light, strong, tough). The LST was the first knife to feature injection molded Zytel handles and featured a total of six parts. His next design was an assisted opening knife called the Strut and Cut; the design for which came from motorcycling. The Strut and Cut's opening mechanism was based on his Ducati's single strut which enables the knife to open and close easily.

Collins was a founding member, with ten other knife designers/makers, of the Knifemakers' Guild. He founded the magazine known as American Blade in 1973, which he sold in 1982 and the renamed title was simply Blade. Collins was later an inductee into the Blade Magazine Hall of Fame.