fo marked Allgemeines Sturmabzeichen badge help Please

[Rescue190]

I am trying find some additional information on this badge. I think the badge is original as compared to other fo marked badges. I am not a big fan of the clasp as it feels thin and light but am not sure. It came with other good items but would like to confirm. I am having difficulty in trying to determine if it is a zinc badge or if the silver finish is that tarnished without rubbing it. It is heavier than I would have expected a zinc badge to feel. I have no others to compare it to. I am also trying to figure out when this was made. All opinions good or bad are appreciated. I hope the quality of the pics are adequate.
John

[Nicola]

Hello,
This is an original and not common zinc Orth Gab. This maker did not do tombak o Neusilber Gab. The grey finish is because silver go on.

Best regards
Nicola

[rbminis]

I agree with Nicola.
I was confident in everything except the hinge. I could not find a good reference photo of it at an angle.
Ralph.

[Rescue190]

Thank you. Much appreciated.
John