Silver Grotto/Yellow Grotto, from Sundry Obras Nuevas

BRUCE NAUMAN (B. 1941) Silver Grotto/Yellow Grotto, from Sundry Obras Nuevas screenprint, on Arches 88 paper, 1975, signed and dated in pencil, numbered 12/20 (there were also eleven artist's proofs), published by Gemini G.E.L., Los Angeles, with their blindstamps and inkstamps on the reverse, the full sheet, a ½ x ¾-in. pale moisture stain at the lower right corner (partially affecting the signature), otherwise in good condition, framed Sheet: 84 x 30 in. (2134 x 762 mm.)