The Shippey “Tone” Octave mandolin (often called ‘octave mandola’) is usually tuned a full octave below a standard mandolin.
My standard scale length is 580mm (23″)  with shorter scales optional. It is great for both melody and chord playing.
It has a carved spruce top and carved Sycamore or maple back and is powerful and resonant.

 

Specification
European or Engelmann Spruce carved top
Flame European or English Sycamore maple back and sides (carved back)
Handmade Shippey Rosette
Bound Ebony Fingerboard
brazilian mahogany neck
Ebony bridge
Bone nut and saddle
Ebony binding to top and back
580 mm scale length
36 mm nut width
mm body width
9.5″ compound radius fingerboard (other radii and flat fingerboard optional)
Two way adjustable truss rod
Cast bronze Allen tailpiece.
Gotoh black mini tuners.
Price £2900  (case extra)