As Cees pointed out, as a joke, not certain exactly why this information is of interest to anyone or what they would do with it if accurate. As he put it, "Now what?"
There's a good reason why so many are not registered. They are not drivable nor in a condition to be drivable. Many never will be. The cost of restoration is often prohibitive today, and in the minds of many always was: that's how MY car got to the awful condition it was in, before I had it restored, and why there are so many basket cases hidden away in barns and garages all over the place. People didn't want to spend the money THEN to fix them, and they probably don't want to spend the money today to fix them. So they sit.