the original Valencia/Benitez recording, I think

Inti-Illimani version
This is Inti-Illimani in exile in Italy, probably an RAI broadcast.
Lineup is one of Inti-Illimani's better-remembered sextet versions:
Jorge Coulon singing and playing guitar, first verse.
Max Berrú's voice takes the high-lying second verse as he plays the drum. The only member of this Inti-Illimani sextet not native to Chile -- Berrú comes from Ecuador, so "Vasija de Barro" is personal for him.
The "charango" is in the hands of Horacio Durán.
The "quena" wind instruments are played by Marcelo Coulon and José Seves.
To the rear, in the center, Horacio Salinas plays guitar and joins in with singing the choruses; he is the musical director, and the arrangement Inti-Illimani is playing is his arrangement of "Vasija de Barro." Don't know why this arrangement does not feature all of the verses -- maybe there were time constraints with the broadcast studio.