That's a nice and good looking cased example of a Treudienst Ehrenzeichen 1. Stufe. I like it
very nice example.
I don't see any red flags.
It looks to have wear to the reverse from being in the case for a long time.
Searching for anything relating to, Anton Boos, 934 Stamm. Kp. Pz. Erz. Abt. 7, 3 Kompanie, Panzer-Regiment 2, 16th Panzer-Division (My father)