That could be a strong clue as to where it might have been used in the movie.
To my eyes, it doesn't look 'designed' enough to be from the movies. Most of the stuff had even tiny little elements that related to a larger design concept... like white tree motifs on small buckles. And I don't see anything that looks particular Elvish or Rohirric to me.
But if it came from one of the appendices galleries, then I'd be wrong. But if it came from one of the appendices galleries, it would be in a category/album that would identify it.
I can tell you there are people here who ultimately more qualified than I as to movie props and costuming.