Roberto Matta (Chilean, 1911-2002) Omnimal, or The Factory. 1972. Etching and aquatint. The sheet: 655x507. Sabatier 286. Printed in colors. Very fine trial proof on cream vellum of the black plate and the blue plate, extensively reworked in gouache and signed in pencil. Scattered light foxing. Small tear at foot of folio. Fold broken in lower right corner. Soiling on verso. Full margins. Final edition of 100 proofs. G. Visat ed.