This S. W. Hayter (1901-1988) aquatint etching, "Red Flow" 1963, measures 27" x 20" overall.  The image is 15 3/8" x 11 1/2".  The print is in excellent condition with bright and clear colors. There is light soiling in margins.  The rippling effect is most likely the result of the print not being throughly dried flat at the time of printing.  It has been attached to the artist show mat with masking tape on the upper edge. This essai print was shown at the Hayter retrospective at the Museum of Geneva 1966.  Thanks for looking!