A Swedish scholar, Per-Ulf Allmo, has suggested that the instrument and another in the same style were probably built in Särna, northern Dalarna around 1680, with Praetorius as inspiration, and with no close affinity with the nyckelharpa tradition in northern Uppland, the stronghold of the instrument.
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The soundbox has an hourglass shape and looks very much like the illustration of a nyckelharpa in Michael Praetorius's Syntagma Musicum III of 1620 (where it is called Schlüssel fiddel).