This is on ebay now:
The description says "This is the earliest revision board put into an apple II plus. This revision of 820-0001-03 is a revision that is pretty rare and have read some resources with questions of whether this revision was even ever released. This came from an Apple ii plus with a low serial around 03100. And is completely working and tested. The board has handwritten date code from 1979. "
Based on the registry project (Link: here ), doesn't that indicate that this board is not a II+ but a II, and not that low a serial?