Not familiar with this maker but it looks legit. I don't see anything that stands out. Can't vouch for the issue number.
Searching for anything relating to, Anton Boos, 934 Stamm. Kp. Pz. Erz. Abt. 7, 3 Kompanie, Panzer-Regiment 2, 16th Panzer-Division (My father)
No red flags for my novice skillset. I'm however, with Ralph I that it is not a maker I've held/seen.
My greatest fear is that one day I will die and my wife will sell my guns for what I told her I paid for them
"Don't tell me these are investments if you never intend to sell anything" (Quote: Wife)
looks ok to me.
I see nothing wrong with it. Not all are numbered so that is a plus.
I have all 3 + the one for wounded, don't remember if all are numbered. I also have award docs for a couple of them.
I've also got most of the regular sports badges and documents for most of them also.
Since this was about the SA badges I didn't mention the others. Now I have to go find photos!