This is one of the portuguese regional violas from central coast of Portugal. It was practically extinct, but fortunately there is a growing interest on this guitar.
This guitar was used by students in the last quarter of the 19th century to play serenades before the actual classical guitar came to take its place.
The tuning is the same as the classical guitar in its first 5 strings. The Toeira Guitar has a very particular sound and it is very intuitive to play.
In its different configurations of construction, these are the most popular:
Top: Linden, Spruce
Sidesand back: Walnut
Fretboard: Wenge, Rosewood, Ebony