My first ever bike was an NSU, a two-cycle 250cc standard bought used in Germany in 1965. It had been manufactured during WW II and started life with the Wehrmacht, as I could tell from the registration book which - at least in those days - would accompany a vehicle throughout its life.
It was a pretty good ride for its day, I think, although (German beer is GOOD) I was rarely sober enough to be sure.
That's quite the story. Imagine that bike being underwater all those years!
When I was a teenager a neighbor had an NSU car, a little 2 door sport coupe. It was kind iof an oddball by North American standards. I think he spent more time trying to get it to run than he actually spent driving it.
I believe that NSU actually designed and built the first rotary or Wankel engine. I'm sure that someone else can confirm or expand on that.
I thought I had owned or at least ridden just about every kind of bike ever made but, I had never even heard of NSU. After reading this story and your replies, I'd like to see one of these in person now.