Medium: original offset lithograph. Signed and dated in pencil by Michael Knigin. Printed in 1971 for The Artist's Proof art revue and published by the Pratt Graphic Art Center. Image size: 9 1/2 x 7 1/4 inches (242 x 183 mm). Sheet size: 11 x 8 1/4 inches (278 x 210 mm).