Bumbeck, David (American, born 1940). WINDOW II. Etching and aquatint, 1966. An Artist's Proof aside from the edition of 35. Ttiled, inscribed "Artist's Proof," and signed and dated, all in pencil. 17 5/8 x 13 7/8 inches (plate), 19 1/2 x 15 1/2 inches (sheet). In very good condition, with a trace of adhesive residue at the top margin, away from the image.