I first heard this polonaise from Sexdrega, Västergötland via Bäsk’s recording on the Nordic Roots 2 sampler (remember those?).
It comes from one of the late-18th century Sexdrega notebooks, two of which are signed by their owners, Johannes Bryngelsson & Anders Larsson, and the others which are anonymous.
Thanks to Musikverket, you can learn more about the Sexdrega Collection and even look at scans of the notebooks online.
If you’d like to play it too, here is sheet music complete with suggested chords (just right-click to save and print the image):
Gilbert Music Studio 