7 string bass viol with 8 sympathetic strings.

- Wood -

Ribs - poplar

Back - poplar

Front - spruce

Neck - maple

Fingerboard and tailpiece - cherry wood with ebony veneer

Tuning pegs - boxwood

Nut - bone

- Dimensions -

String length - 725 mm

Rib height - 120 mm

Width of bouts - lower - 405 mm / middle - 328 mm / upper - 332 mm

Arching height - 20 mm

tuning of sympathetic strings - d, e, f#, g, a, b, c#, d

Video of instrument played by Joël Sitbon https://www.youtube.com/watch?v=FN7unuD3NaY