Ludwig Wilding (German, 1927-2010). Monochromatic op-art screenprint on paper. Pencil signed and dated 1971 along the lower right and numbered 73/100 along the lower left. Further signed, dated, numbered, and inscribed “serigr.,” “sig.,” and “(U7 23/74)” along the verso. Height: 23 1/2 in x width: 23 1/2 in.