Hatchet Hardening

[M3mphis]

Except that the hatchet was made in the 1970s. I don't see this as an insert. This looks like a hardening line to me.

Agreed. It's just a quench line. Certainly not a hamon.

Sorry. No, I was talking about the Mustad.

We need to see a top view of the OP's hatchet to make a determination. It's easy to see that Matt's Mustad is an insert.

Agreed.