This is a very rare vintage ka-bar union, cutlery, trifold, single blade, knife, and hard to find. It is a brass and steel design with wood scales I believe. Early production has patent applied for stamp rather than more common union Cutler remark.
Not for sure of the age of the knife, but looks to be very old and for its age I would say this is in good shape. I do believe it could be polished out to be one awesome looking display piece not to mention a nice conversational piece! Would make a great Add to anyone's collection! If you have any further questions, please feel free to ask?