That's great, it's got a little bit of everything in it. I have not seen this before, although I have seen similar rugs with little parts of this. Just because it is completely one of a kind does not mean it's priceless (although it does appear as though it could be a fairly good carpet in the sense of weave and character). I don't know what your objectives are with this piece, from a replacement standpoint the rug would likely be rather difficult to replace, although that does not mean it's priceless. Please see the required forum images for evaluation on type, origin, etc.