"basskisser" wrote
It looks like it might be a fabric skinned aircraft.

It was aluminum, except for the control surfaces which were fabric covered.
Which is why you see the bare frames of the control surfaces in the
pictures.

I wonder how many people there are in
the U.S. that still do that?

I believe it's still included in the curriculum of most aircraft mechanic
programs. There are still quite a few airplanes in service that are at least
partially fabric covered.