I have a few reasons why I don't trust it:
First point is that the seller constantly sells faked stuff, especially flags and insignia.
Another is that the inner edge seems to be rolled from how I see it instead of flanged. Perhaps a side profile would help. I have a cockade that is extremely similar that is a fake and made of poor quality metal. I'll post a picture of it later for comparison.
I'm happy to be proven wrong, but at the moment, I don't trust it. I certainly don't trust the seller either, but that's separate from the item, of course.
Thoughts welcome.