NSDStB Studenten-Bund Koppelschloss genuine?

[Adyraphael]

This belt buckle is de-Nazified but appears to be original in my opinion not an expert but I have some doubts about the authenticity of the buckle and I want the opinion of experienced collectors.
Many thanks moderators and collectors!

[Ben Evans]

Another molded fake, look at the rear pic, you can see the casting flaws winking at you, and the prong sleeve

[yellow12]

Hello,