I think my keyboard is pretty old, but i can't find a date on it. Although, there is a pretty funny warning..
WARNING: Improper or Prolonged Keyboard Use May Result in Injury.
I think my oldest thing is my 3rd NIC(Yes, I have 3 NICs in my computer.. Sharing 'net with 3 people).. It's an old Intel ISA NIC.. Not even PNP.. You have to go into a DOS setup program to set it's IRQ and address.. Heh.. It has to be pretty old, at least early 90s..