This Senpolska från Offerdal is attributed to Lapp-Nils, the great fiddler from the early 1800’s. It was published in the collection “Svenska Låtar”, #114 in the Jämtland volume. For the collection, it was played by Anders Grelsson (born 1844) in 1904.
The Senpolska is a slow type of polska dance, originating in the more northern provinces of Sweden.
Here is a video of me playing the Senpolska från Offerdal.