Yes, regarding the steel version 1.27mm works out to 18 gauge which is much smaller than most anything you're going to find these days. 16 gauge is I think the smallest butted dia available at this point.

And it looks like mine is also the alu version. I might throw a tire on and ride it once on a track just to see what it feels like 😬

I have to imagine that if Dyneema and advanced adhesives had been more available in his day, Harlan would have gotten around to making a wheel with those.