Well, I have etched the blade and maybe Bill is right
seems monosteel, with hardened edges, but also there is a thin line in the middle of the blade (that is not the central rib) that maybe is still a sign of a very simple lamination? Could you see this thin line in the middle of the blade? ah, another thing: seems that for the first third of the blade (from handle) is simple monosteel and than start the hardened edges (the "working" part of the blade)
The pictures are very bad, sorry