Jan Dibbets ← 0 / 0 → On May 9…, Seth Siegelaub, New York, 1969 Announcement card Afsluitdijk 1969, The Sound of Driving 5 km on a Straight Road with a Constant Speed of 100 km an Hour, Museum Haus Lange, Krefeld, 1969 Platenhoes (recto) en 45 tpm single Afsluitdijk 1969, The Sound of Driving 5 km on a Straight Road with a Constant Speed of 100 km an Hour, Museum Haus Lange, Krefeld, 1969 Platenhoes (verso) voor 45 tpm single,