Julia Trintschuk plays Mvt. II from Sonata I by Argentine composer Carlos Guastavino (1912-2000) on a on a 2017 Enrico Bottelli. This comes via the excellent Siccas Guitars and their fantastic YouTube channel. You can also see her play the first movement here. I’m interested in hearing more Guastavino works for guitar for which there are three sonatas and few chamber works.
Sheet Music: Three sonatas via Sheet Music Plus (I haven’t seen this): Sonatas 1-3 by Guastavino