Thanks for the feedback. I have seen the A4000T bare boards that were reproductions but not a desktop either.
In terms of it being from when Commodore went under, I would have guessed the last rev (Rev D) bare boards may have been left over and they would have used up the previous revs.
It's definitely interesting and is a great looking board. Too bad it's more than two layers or it might have been useful for reproduction. I do have an A4000D with the same Rev B board that can use some fixing 
You may be right, but commodore had outside companies making a4000's also ,CEI comes to mind. Maybe leftover from them? who knows.
I have fixed many a 4000 boards, so i know where you are coming from. It was known batteries did damage pretty early on,i wonder why so many people ignored them.