I've found some attempts at translations but no pictures of the actual contents. Is this intentional? Why? Is this common practice to shield pictures of ancient artifacts from the public? I realize there's not enough resources to photograph everything old but surely this book has enough significance, even just for its age alone?
I'm very sceptical. I've never heard of it until today. I find so little information on Google, nothing on Google Scholar (except for one small reference to the same BBC text that all references seem to lead to). The museum director (who has died recently) appears to be somewhat of a controversial historian. The linguist Vladimir I. Georgiev is supposed to study the tablets, but a quick search shows he died in the 80's. It's definitely not common practice to shield pictures of ancient artefacts from the public. I think this all points to the possibility that it's a fraud.