1971 45.2 cm x 57.5 cm - 45.4 cm x 59.9 cm Editions CR: 41
Offset print on rag paper
Yellow, red, blue, and black offset print based on a photograph of the Teyde crater on Tenerife.
150 copies, signed in pencil, dated at bottom right, numbered at bottom left.
Unknown number of trial proofs, signed and dated in pencil at bottom right marked at bottom left: Druckprobe or Probe.