This Reinländer från Transtrand is a charactaristic tune from the region of Dalarna bordering on Norway.
A reinländer or reinlender is basically the same dance as the schottis, but the name is the usual word used in Norway.
Omas Per was a fiddler from the village of Transtrand. This particular tune is a favorite there.
Here is a YouTube video of it being played by a Swedish fiddler. Notice that he is playing an 8-string fiddle. The 4 extra strings run under the fingerboard and through the bridge, like the resonance strings on the Norwegian Hardanger fiddle.