It looks like a good original to me.
You can compare to my cased example here.
Treue Dienst Ehrenzeichen, 25 Jahre
Searching for anything relating to, Anton Boos, 934 Stamm. Kp. Pz. Erz. Abt. 7, 3 Kompanie, Panzer-Regiment 2, 16th Panzer-Division (My father)
Thanks for the feedback. Now I need to find an original box to put it in! Nice example you have Ralph!