NSD-Studentenbund Honor Badge

[medalnet]

Got it. This is a very interesting topic, indeed. I can certainly send you high resolution scans of mine.

 

[medalnet]

I accumulated a few more and found another variation with a number over 4000! also, a zinc-based pin.

 

[Poloberst]

Apparently the Anstecknadel attachment of the pin was very insecure as I have a couple official lists of a few dozen identified lost badges from 1938.