Mönchengladbach, Städtisches Museum, 14 August-14 Sept. 1969. Cardboard box, 21 x 17 x 3 cm, with on top a photograph of the artist standing next to a Dakota, and a text by Johannes Cladders on the bottom; string in box.
Multiple/catalogue. One of 330 numbered copies. The length of the string in the box corresponds with the diameter of the propeller of Das Flugzeug, a helicopter with two propellers, each composed of three blades, that was exhibited.