Since the metal suspension loops and chain are set in the plaster and would have to be original to it and not added, I don't think it was intended as a bookend. It looks to my non-professional eyes like it is not very old, maybe 1990's and something that would have been marketed to the Goth crowd. I would have to cast my vote for modern Goth decor. Check out the "antiqued" wash that it seems to have painted over it. This is especially visible on the side where the marking is. I'm voting decorative rather than functional, Goth decor, circa 1990's. It looks like it has got a repair to a nasty break in it also, so I don't think there is much real value. Unfortunately, a lot of antique shops sell reproductions and just plain "old looking" stuff right alongside actual antiques. I could be totally wrong on this, but that's what it looks like to me! Correct me if this sounds off please, I'm here to learn!