Six-string alto guitar

Mauro Giuliani and Caspar Joseph Mertz wrote extensively for the terz guitar as a complement to the prime (standard) guitar.

Acceptable alternate spellings for terz include tierce, third, and tertz.

[2] At the 2018 NAMM Show, Reverend Guitars launched an electric Terz guitar in production along with Billy Corgan.

[3] Rainer Stelle: 100 Jahre Musizieren mit Terz-, Prim- und Quintbassgitarre in Deutschland, in: Auftakt!

4/2015, p. 43–45 (Fachzeitschrift des Bundes Deutscher Zupfmusiker e. V.)