Hello, yes, these daggers, especially the EICKHORN ones are very difficult to judge. ALCOSO, with the special grip badge is somehow easier. I do not have much experience on this special kind of dagger.
I can only mention some forensic facts. On the dagger shown I think to see the large EICKHORN pommel with totally matching patination so this would fit and for me it excludes that the pommel has been postwar added to a (later) KM dagger. The pommel fit to grip is, what I can see in the pics, good which is a big plus. Cannot say anything about the badge but what I can see in the pics it is no police bayonet badge and no police degen badge which is also a plus in my eyes..
IMHO this dagger has at least a good chance. Just my personal opinion.
Regards,
