The top one is the very early and rare first swedge. The middle one is the later swedge. But what is the bottom one?
Per the seller:
"Edge - The original edge has been ground off and a new convex edge has been ground on by a Master Blade smith. It is a much better edge and works very well. It is also much easier to sharpen in the field. Blade is natural finish and has slight gloss to it. It is NOT a super bright polish Condition is used, but in very good shape. This knife has not been used very often, only as a demonstration knife is a cutting competition excecise that involves cutting through a 1.5" piece of free hanging hemp rope. This knife passed this test Sheath is a stock Busse black Kydex sheath. "
I E-mailed the seller and asked if the swedge had also been reground. He said that it was an original ZT NO except for the edge.
Per the seller:
"Edge - The original edge has been ground off and a new convex edge has been ground on by a Master Blade smith. It is a much better edge and works very well. It is also much easier to sharpen in the field. Blade is natural finish and has slight gloss to it. It is NOT a super bright polish Condition is used, but in very good shape. This knife has not been used very often, only as a demonstration knife is a cutting competition excecise that involves cutting through a 1.5" piece of free hanging hemp rope. This knife passed this test Sheath is a stock Busse black Kydex sheath. "
I E-mailed the seller and asked if the swedge had also been reground. He said that it was an original ZT NO except for the edge.