Welcome to the forum! It is a Luftwaffe (German Air Force) Flak (Anti-aircraft) enlistedman's visor.
It would have been a beautiful cap if the the visor wouldn't have disappeared.
Looking for WWII U.S. dog tags
Nice original visor by the look of it. Mo is right in the description.
add a visor and your away !!
Hello! Nice piece, i hope you can fix the visor.
It's Hoffmann, not Koffmann.