Woah, debbie downer stepping in here. I don't think this was purchased in1990 because the first compression molded board was shown at a trade show in 1991 or something. So for the interested parties, be informed that while it's old, it's not rare. I'm guessing that board is from somewhere around 1994. It's hard to keep those years straight after all of this time.
But i do love to see people with an interest in those old boards.