Hello Detlef, And thank you for your kind words and interest in this unusual piece. As these copper bladed daggers seem to be few and far between and even less common than their brass/bronze counterparts. I was extremely happy to have been able to acquire this piece for my collection. I have added a photo to my original posting that was graciously given me by Lorenz (AKA Migueldiaz) in reference to another piece in my collection that helps explain some of the symbolism used on this piece. Finding any information on these copper bladed knives and daggers has proven to be difficult to say the least.
Best,
Robert