Mark 8 pc boards

Today I found the company, Techniques, Inc. in Englewood, New Jersey, that made the printed circuit boards for the "Radio Electronics" Mark 8 computer. They are in the same location as in 1973. Afaik, they have no web site or email. I called them to ask if they could look for any material, or any information, like how many board sets were made or sold. I found nothing. They first thought that "Mark 8 microcomputer" was the name of another company. I finally found someone who said the company was bought in 1987, and that all information before then was gone. I've also learned that the printed circuit boards were 2-sided, but had no plated-thru holes. This may have caused problems to IC solder connections, making reliability problems. I don't know if this would make buyers abandon them making the numbers larger or smaller than otherwise. -Dave