Killer hunt man! That DBLC is fantastic and probably one of the best dug ones I've seen. Those brass keys are also awesome... some of my favorite things to dig. I also REALLY like the wooden handle knife with those pewter or lead inlays. The wood handles I've dug have become brittle and fallen apart, so I started to preserve them with polyurethane. You'll want to clean it and dry the wood out really well... then I put some polyurethane in a zip lock bag... enough to cover the wood handle and I drop it in there for a few hours or day with the bag closed and no air in there. The wood will absorb the poly. Pull it out and let it dry. It'll make the brittle wood nice and hard so it wont fall apart over the years.
Great hunt man.