It looks to be an unmarked Frank & Reif, but the obverse details look quite soft.
You can compare to my example here.
Panzerkampfabzeichen in Silber, Unmarked Frank & Reif
Ralph.
Searching for anything relating to, Anton Boos, 934 Stamm. Kp. Pz. Erz. Abt. 7, 3 Kompanie, Panzer-Regiment 2, 16th Panzer-Division (My father)
Similar Threads
Bookmarks