The interesting thing is that the PSU/analog that was in that Plus is standard USA 110V

EDIT: come to think of it ...

I got that Plus from a friend's wife. It was her family's computer when she was growing up. They did spend some time in Germany and other countries when she was small. I believe she was actually a US citizen born abroad. So there is a possibility that Plus was bought in Europe and the analog board switched when it was brought to the USA.