The blades look to be in good shape, but the handles are obviously a total loss. I'd pay a custom maker or tinkerer to replace the handles with some nice jigged bone. Then sharpen up the blades, and should be good to go.
The trick with those Old Timer knives is that many of them have a rather unique assembly method called a "Swinden key." Not everyone will know how to safely take them apart and re-assemble, but it can be done.