Vintage byzantine jeweled collar necklace stunning exceptional need repair READ

This is a vintage byzantine jeweled collar necklace. As I have pictured in the last three pictures, it is missing the clasp I always thought it was missing a stone on each of the last links, but I’m not so sure as I have seen a picture of a Givenchy byzantine collar necklace that looks almost identical to this and it does not have a stone in either of the final links. This necklace looks almost identical to the Givenchy byzantine collar necklace that is selling for over $5000 on a different website. As far as I can see this is unmarked, but it is a stunningly beautiful necklace. I am selling it AS IS please note I am selling this AS IS UNMARKED It is unmarked, but for reference, you could look up the very very similar Givenchy necklace to see how it could be repaired if you have a good jeweler