Here is a 19" Arrow Racing “Fast Wheel” made in the USA. 36h, 578g, 33mm wide, double wall, welded seam. Strong as hell, very good condition with some scratching as you can see. Not quite as wide as the modern rims but extremely strong, light & aerodynamic. 
$40 shipped in the USA.
Bump
Price reduced to $35 shipped for a fine piece of American engineering. I also have a second trials 19" rim. Normal style, black w/silver sidewalls, double wall, 36h, with almost identical measurements to the Arrow. $30 shipped.