So this has been bugging me for a while and I finally cracked it! While perusing past auctions I came across this lot of original drawings from Rio Phior which were once owned or published by Mirage / Karl Bornstein. Seeing this image a few years ago I too wondered briefly if it were a Nagel until it was pulled from auction by the estate but that still didn't answer any questions, this finally solves it for those who were still curious.
PORTRAIT OF WOMAN WITH BLUE EYES, color pencil on brittle black paper, 16 ½ x 13”, taped onto board, 25 ¼ x 19”; Together with WOMAN WITH GREEN SCARF, three color screenprints on brittle black paper (same image), all signed in pencil, from the numbered editions 240, images 24 ½ x 17”, all with full margin; GIRL WITH BLOND HAIR, color screenprint on brittle black paper, signed in pencil, artist’s aside from the numbered edition, sheet 21 ½ x 28”, all published by Mirage Editions, all with blindstamps and dates 1987, two with losses in corners, otherwise in very good condition. (5)
here's a link to the past auction, only $25 bucks what a steal!