Colour lithograph. A.P. IV, artist's proof outside the edition of 120. Signed in pencil lower left: Alex Katz. Sheet size 56.1 × 72.2 cm on wove paper by Arches (with the watermark). Published by The Skowhegan School of Painting and Sculpture, Skowhegan, Maine. Printed by The Bank Street Atelier, Ltd., New York.