18 x 23.2cm, silver gelatine vintage photograph from the Festival Happening and Fluxus, in the Kunstverein, Cologne, Novembre 1970. The image shows Wolf Vostell and Alan Kaprow having a chain holding them together cut with a saw by Raphaël Sorin.
This period photograph was taken by Werner Kruger and his rubber stamp impresison is on the reverse of the image. VG+. Possibly unique.