First of all a KVM on einzelspange is not easy to find, much rarer than finding an KVK2 on einzelspange
Regarding the maker mark I cannot say for sure if it is genuine or not, but it looks legitimate.
I never really gave the KVM any thought, but now Im starting to like even more than a KVK2.
I recall seeing marked ones, on the ring and on the side like this one, but I have no idea how many makers or witch did at some point mark them. I will try to find more, thats for sure
Cool! Now I have to get myself a maker marked KVM
Not easy to find a mounted KVM. Very nice piece.