Hi
This type of "old regiment" eagle has been worn by 3 units: UR 1, 2 and 3 since 1844 up to 1868. At this date, the agle came down to the front of the tshapska.
My Wappen plate is very light but very detailed.
I would say it is a "extra helm" item for officer (even if the crown is not avoid) or a Fähnrich or an excelllent galvano !