From the brochure that came with my armorhide:
"These deluxe hunting knives with new, handsome blade designs, are hand-crafted from an exclusive high speed tool steel - hard enough to cut other steel! Having a super -hardness of Rockwell C60-62, each blade is ground to a straight, double wedge shape for razor sharpness and extra strength to withstand the roughest use. A special hard chrome plating keeps these blades permanently bright and stainless. The solid aluminum alloy handles are cast directly onto the notched tang of the blade. Armorhide, a ground thermoseetting vinyl material, is then permanently fused to the handle to create a non-slip firm gripping surface, even when hands are wet or slippery."
There were at least two versions of the armorhide series. The later or possibly last version has a lanyard hole. There was also a custom series using the same blades as the armorhides. These came with at least two types of handles, micarta and ebony.
These are great knives and there is collectors interest in them. As always, the specimens with box, sheath and paperwork will bring the most. I haven't looked at them on e-bay in quite a while, so am unwilling to guess at value. In the 80's they retailed in the $30-$40 range.
Closest thing to an indestructible knife any one ever made. You should keep it.