Hammarbergs-Hans was a “storspelman” (great fiddler) from the little town of Torsåker in the province of Gästrikland. He had a large repertoire, including a good number of waltzes. This one is characteristic of his style.
I learned many of his tunes from a wonderful fiddler from Gästrikland, Stig Sjödin. This is one I got from him.
Here is a video of me playing this Vals efter Hammarbergs-Hans.