(I'm going to bed after this, I promise)
Okay, so I'm looking at my 86B and comparing to the serno list.... Mine is:
2412A27868
which should be a bit older than the previous recorded oldest. (yay, I get a record for a while)
I'm curious about the 27868. I somehow doubt that nearly 28,000 HP86Bs were made in one week in 1984. Maybe that number never really got recycled?
-Christof