N.S. Studenten Kampfhilfe Pin Badge M1/33 - Info / Authenticity?

[Montipoll]

Another badge from stepdad's collection, a N.S. Studenten Kampfhilfe Pin Badge, marked M1/33.
I've seen a few other posts of the same ones but not entirely sure if the general consensus was good? This does have some weird stuff on the back at the bottom, not sure, could be like dried glue or some residue from a peeled of sticker or something (?) Maybe it had a price label there from it's previous owner.

Could anyone confirm if this looks to be ok and original. Any other information appreciated.

Thank you all, Bex.

[Reinhard2]

The RZM 1/33 mark never existed for these. They have to be gilded and the most known pattern is RZM 1/63.