Ink, collage, and graphite on paper artwork by Sandu Darie, 1908 to 1991, a Romanian-Cuban artist, member of MADI and Los Pintores Concretos groups. This lot is an example of the artists Concrete Art period, highly influenced by Mondrians Neoplasticism. The artwork depicts fragmented circular forms in black and red colors. The piece consists of four joined paper panels, each is signed by the artist in the upper right and lower left. Dated 1962 on the backside. The artwork comes with a letter of authenticity by Pedro de Oraa, 1931 to 2020, a Cuban Abstract artist, member of Los Pintores Concretos group. Collectible Mid Century Modernist Graphic Art, Latin American Artists.