細節
A Triola mechanical zither,
with 25-note roll-operated section and six hand-played chords -- 21in. (54cm.) deep, with six rolls (fret-board split and warped) (7)
with 25-note roll-operated section and six hand-played chords -- 21in. (54cm.) deep, with six rolls (fret-board split and warped) (7)