The three I bought from Ona were stamped "ONA'S" on the bottom--you can just about make that out in the first pic. I tried to get a pic of the marking, but I couldn't make one. I personally prefer bearing steel and brass (the kris bladed-one is all brass, while the rest have aluminum channels), but Ona carries aluminum-handled 29s with deer inserts and 440c blades. I guess his are good for EDC because of the light weight and corrosion resistance, but I like the durability of the brass and the razor edge I can put on the bearing steel.
Just have to keep them oiled.