Jacobson Nautilus Concerto #38 10-string mandolin

Nautilus 10-string Concerto #38
Custom 13.75” to 15” multi-scale, tuned CGDAE
Sitka spruce top, custom Concerto voicing intended for Thomastik Mittel strings
Parallel tone bar bracing
Nouveau f-holes with smoked etimoe purfling inlay around sound holes
1.95″ side depth (deeper than usual body, but not so deep as to lose the clarity of trebles)
Highly figured bookmatched walnut back w/ sapwood
5-piece walnut and curly maple neck w/ extra carbon fiber reinforcement
Compound radius black ebony fretboard w/ walnut and maple angled fret markers on top and side of fretboard
Highly figured walnut headstock w/ thin line Jacobson script inlay
1.32? (1.39” on the hypotenuse) nut width, standard compound radius
C shaped neck, custom shallow profle
.080? x .040? frets (“Banjo frets”)
Thin satin marine varnish finish

There is no plastic binding — the walnut sides, maple and fumed etimoe (black stripes) sides act as binding, and the fretboard feels just like a bound neck (undercut fret tangs, and the fret slots do not extend to the edge)

Jacobson wenge bridge, special compensated and angled ebony saddle
Jacobson engraved and selectively darkened brass tailpiece with black ebony frame

Custom 10-string Rubner tuning machines with gloss brass finish and rosewood buttons, teflon bearings