This is a beautiful instrument, Darens model. Here Javier JanAId used a combination of black Walnut, Maple(curly) and Bubinga, with an Elondo fingerboard. This bass has a particular tone, full of mid frequencies
This fanned fret 4-string is based on Little Guitar Works Torzal “Standard” model, which is a neck-through construction with a 35° twist in the neck. From the “zero” plane of the body, that total twist consists of 20° downward rotation at the nut and 15° upward rotation at the bridge.