I new it !
Garde Adler...
It should have:
-Nr 2 Kürassier Wappen (with 'Hohenfriedberg 4 Juni 1745' ribbon)
-or Linien Kürassier Adler Wappen
-or the dragoon eagle Wappen for the Jäger zu Pferde.
Do you have the makers name ??
Nevertheless: looks great.
I think I once posted an article from the German 'Visier' Magazine on miniature Kürassen, metal and leather helmets.
Just PM me your mailadres.
Rgds,
Francis