One of the rarities from Latin America and still undiscovered was a band called Aditus, From Venezuela. The first 3 LPs are 3 different animals.
A traves de la Ventana from 1977 is a blend of Brand X and Mahavishnu, a great progressive jazz rock album, mostly instrumental and almost impossible to find, no CD available. Aditus 2 from 1979 is a very different work, more Latin jazz rock oriented at times like early Santana but with sax and keyboards instead, instrumental. No CD reedition. Read more on Last.fm