New York: Sidney Janis Gallery, 1956. Announcement poster and invitation to the preview for Willem de Kooning's exhibition at Sidney Janis Gallery, New York, April 2 – 28, 1956. Gallery name and address printed verso. 17 1/2 x 16 1/4 inches. Machine-folded three times for mailing; this copy unmailed. Light wear along the folds, and very light soiling, else near fine.