I checked with some of my sources about the H-D bike at the Bicycle Museum of America. It was made by Huffman (later Huffy) for Harley-Davidson. No lightweight info here.
But there are several early Schwinn Paramounts & other a few other vintage lightweights at the museum (most purchased from the Schwinn family collection). More were displayed than I remember from my earlier visits.
Mike Self
Cincinnati, OH