Rolf Hans Frankfurt 1938 - 1996 Basel John Cage, Wetzikon May, 1990 signed on the Mount and dated Verso signed, dated and titled 23.6 x 17.6 cm Provenance: Estate of the artist Rolf Hans was a friend of John Cage. The photo was taken at the legendary mitorganisiserten by Werner Bärtschi series of events with three concerts with John Cage in May 1990 in Switzerland. This piece has an attribution mark, I am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution