Electric Chairs : one plate

ANDY WARHOL (1928-1987) Electric Chairs: one plate screenprint in colors, on wove paper, 1971, signed and dated '7' in ball-point pen on the reverse, stamp numbered 187/250 (there were also 50 artist's proofs in Roman numerals), published by Bruno Bischofberger, Zurich, with their inkstamp on the reverse Sheet: 35 3/8 x 47 7/8 (899 x 1216 mm.)