German Husaren atilla Rosette?

[Ironcrown]

I got these two sets in an assorted lot I purchased.
I believe these devices were to be applied on german hussar atillas. But are they originals?
One set is very bright, the other is darker. Maybe officer and other ranks?
Size: 28mm of diameter.

Here's the first set with three extra buttons (for shoulder straps?), unfortunately one is missing the nut.

[Ironcrown]

Detail of a single one. Some rosette look like if they have some kind of marking on the front, but it's hard to read.

[Ironcrown]

The small buttons, all very well marked.

[Ironcrown]

And this is the second set, much darker, probably it's oxidized brass, with no gilting.

[Ironcrown]

Looks like there are some different makers on these rosetten, but all except one are almost identical. Only one is somehow different, but you can realize it without doubt only from the back. From the front it's still very similar to the others, at least at a first sight.

Any comment will be appreciated

[Ironcrown]