I have a suggestion for taking images with a smartphone. The images are probably blurry from being too close to the item when taking the image. I've done the same thing, gotten too close and the image on the screen looks clear. But when I get them to my computer to look at them they are blurry.
I've learned to keep back from the object and zoom in by touching the screen with two fingers and "spreading" the fingers apart.
we need some better pictures, and take good pictures of both sides and pics of the hole at the top. Also why do you suspect if to be from Hungary and 800 years old? Did someone tell you this, or was it your own research that lead to that assumption? What is the back story, where was it found and purchased/changed hands? All this info will help get a better ID.