Nice pickup and a great bayonet, I particularly love the toned stag it has. The blade is a short stiletto type particular to WKC. Ron Weinand also identified Henckels as a manufacturer that utilized this type of blade. Also notice the lower scabbard fitting which is not garden variety either as it is not "scalloped" in the center. A shame it's missing the grip emblem and clamshell, but still very collectible.
I'm of the opinion that this bayonet had the Weimar emblem when it was removed despite it being missing the clamshell. I believe when they added the 3R emblem, the rivets were also replaced with larger aluminum rivets. I've seen a number of similar bayonets that still had the Weimar star although the clamshell had been ground off. You can find a replacement emblem if you look around, try Tom Johnson's site.
I have an identical model in gold with 3R emblem and brown rural scabbard. The piece is very near to my heart.
