Luftfische. 1967. Gouache and India ink. Signed and dated lower left. Once more dated "25.1.67" and titled on verso. On wove paper by C.M. Fabriano (with watermark). 48,1 x 65,7 cm (18,9 x 25,8 in), the full sheet. With pencil sketch of a fish on verso. Due to a resemblance in style, this sheet presumaly is a preliminary study for the oil painting "Luftfische" (Krause 741) from the same year. [KP].