Looks like a nice "frosted" unissued item...just my thoughts as I am not a 3rd R collector...however I had a Medic in the 80s that served in late WW2 and brought back a shoe box full of unissued badges in there cases, he gave me one of those.
Just My Thoughts.
Compare with this one, you may find your answer there.
1939 Spange zum Eisernen Kreuzes 2er Klasse 1914, Unmarked Early Deumer
Searching for anything relating to, Anton Boos, 934 Stamm. Kp. Pz. Erz. Abt. 7, 3 Kompanie, Panzer-Regiment 2, 16th Panzer-Division (My father)
its a very nice original one.
My word is my honor and bond. Currently looking for an EKI second model screw back Juncker spange. Also, marked EKI screw back cases.
this is beautiful.
err, what does "frosted" mean? silver plated?