I'm surprised you say that JC. Have you asked him? If you supply him with a serial number I believe he's quite happy to look it up and give you the details. He has for others, although I've never got around to requesting it on my machines. Unfortunately, although he's registered as a member of the site, I don't think he visits.
Although it's true the serial numbers started at 101, I can't believe there were another 105 Payramids made after this one because the rate of production was so low by this time. I guess the only way to find out is to ask our friend...