Clockwise from top left:
"Valley Curtain, Grand Hogback, Rifle, Colorado, 1970‐72.” By Wolfgang Volz, 1989. Number 1 of "Christo and Jeanne‐Claude: Five Projects." A portfolio of five limited edition dye‐transfer photographs of Christo and Jeanne‐Claude's major projects by Wolfgang Volz. Signed: "CHRISTO" (lower right) and "VOLZ" (lower left), "AP 8/10."
"Valley Curtain, Grand Hogback, Rifle, Colorado, 1970‐72." Artist: Christo. U.S. Postal Service postage cancellations. Artist has signed postcard and envelope commemorating the 25th anniversary of Valley Curtain.
#2 of a set of 11 collage/photo lithographs. "Valley Curtain, Project for Colorado, Grand Hogback 1970‐72." Signed in the plate and in pencil by Christo.
"Valley Curtain, Grand Hogback, Rifle, Colorado, 1970‐72." Artist: Christo. U.S. Postal Service postage cancellations. Artist has signed postcard and envelope commemorating the 25th anniversary of Valley Curtain.