Aquatint on paper, not signed or numbered. Image 38x54cm, sheet 50x64cm. Image created 1954-55, published 1961.
Notes: this aquatint was published in an edition of 125 in 1961 with a stamped signature bottom right (see Tate Modern). Our example is the same size as that in MOMA New York which is unsigned and described by the museum as being a proof taken before the print run. The printer is said to be unknown and the publisher Schweizerische Graphische Gesellschaft of Zurich. The main print run appears to have an image size of 28x38cm.
38x54cm
Any extra information or corrections you can give on either the artist or artwork would be appreciated.