Stanley William Hayter (British, 1901-1988). Etching in color on paper titled “Onde Verte,” depicting layers of parallel wavy green lines on an orange background. Pencil signed and dated 1965 along the lower right, titled along the lower center, and numbered 25/50 along the lower left. Provenance: Distinguished corporate collection, Minnesota. Sight; height: 25 in x width: 21 in. Framed; height: 35 1/4 in x width: 29 1/2 in.