I’m also not an expert but- I agree with the above. I don’t think it’s real. It appears to be BASED on a Royal Eagle. However no royal eagle I see in my search has a roman numeral face, the crown looks wrong for a Constantin (based on again, what I’m seeing) and none of the other bits seem to match up.

If it is real, I’d love to see where I missed. It would be an excellent learning experience.