The first one reminds me of an old Don King I saw. It really looks like a Barry King, but rugged looking. The second is a hackbarth and it looks like a saddlers blade is equipped. The third one is a HD devillis with a perma blade. The last one is also a hackbarth, but I too question whether it has an original blade. It might be, but I am not sure.
In the second picture, you have a interesting find. The first one looks a lot like a hackbarth knife, but probably a imitation knife. Still not sure. Now, probably the best one is the final knife. This one is a Paul Burnett swivel knife. Interesting to know. I talked with Paul before his death about the same knife in my collection and he told me that the knives did not come out as he originally designed and called them flawed.
Enjoy your knife set. I am always looking for unique knifes for my collection.
Sam