Yup, 19mm. These are great basses. Not as ‘big’ body wise as the JP1, but ‘denser’ for sure. The maple wings are definitely part of the mix that makes them feel rigidly built and resonant.
The fretboard is huge, but slender front to back. It feels much easier to play than the Zon with its D shape and 16.5 spacing.
Although I liked the JP1, I prefer this bass mainly because of the neck thru. In comparison the TRB6P feels more responsive and even across the neck. Very, very playable and a lot of fun.