Indeed, I am the owner.
It is true that this piece, at some point, was ultimately rejected.
When I was purchasing it, I challenged the vendor on authenticity - and he eventually explained how he came about it. While this story cannot be verified, at least not easily, I have the engineer's name, address (I paid by cheque) and our correspondence.
My listing simply summarises the correspondence which I trust to be true. There is no reason to be unnecessarily hostile...