I'm not qualified or certified to authenticate the signature. However, I doubt a reputable art house would sell anything fraudulent. The frame was to keep the record intact, but is loose now because I had to take pictures of the vinyl itself.
So the frame is disassembled now, but I have it if you need it. This item comes from a smoke and pet free home. I love this piece, but I travel a lot, and would rather someone else enjoy this on their wall.