I‘m sorry, but when I look at the detail photos, I start to doubt nearly all of the parts.
- I have never seen such the folded corners of the trimm on the front visor and the rear visor. As far as I know, they weren‘t messed up so overlapping at the time.
- Unfortunately, the helmet eagle seems to be a reproduction when I look at the back. The star was apparently painted gold. The Oldenburg coat of arms has a very good quality in the imprint, but the mounting tabs seem doubtful to me. And since the eagle is not original, I get a stomachache.
- The chinscales and cockades are unfortunately reproductions, as you have already written.
I would now unfortunately assume that the complete helmet is an aged reproduction