I have an early 1956 (org gray/green) and it has a 12V gen. I am the 3rd owner (bought from guy who only owned it a short time, who bought from church who bought it new). So, I believe it is original.
Can they rewind a 6V gen to 12V?? I think 12V is the way to go.....getting harder to find 6V bulbs and the prices they are asking for them now.