Maximum Recurve

Knife #5: My father requested a knife with a lot of re-curve to the blade so that is exactly what he got! If you look closely near the middle of the blade you can see five small dots left from a Rockwell C diamond indentor. I was using a Rockwell C hardness tester to check the quality of my heat treating processes and realized that it was about the only way I had available to mark serial numbers on the blades after I had hardened them. I later moved on to stamping serial numbers before hardening and eventually switched to electrical etching.