This 7-notes scale is of course the
F1-C2-G2-D2-A2-E2-B3-F4
and its span is 3 octaves when closing back to F.
The violin, mandolin , mandola, octave mandolin, tambouras, Iris bouzouki, mandocello etc are tuning in segments of this scale.
This tuning allows rather symmetric representation also ofthe melodic-harmonic 7-notes 2-octaves scale (of chords) as in post 79.
