Two sided postcard / invitation to a preview of the opening exhibition of FlatFixed Gallery held May 23, 1970. Directors of the gallery: Mark Gabor, Arthur Levin and Paul Margulies. Artists included Abbot, Appel, Arman, Aronson, Bark, Barowitz, Bayrak, Belkin, Birmelin, Bradshaw, Brown, Carter, Cox, Crum, DuBack, Dworzan, Ewers, Hinman, Indiana, Jenkins, Kessler, Koslin, Kurhajec, Linder, Lindner, Millions, Milne, Molinari-Flores, Norvell, Noël, Rauschenberg, Rivers, Shmerechniak, Spina, Stücklen, Summers, Wachsmann and Wiegand. The opening including a performance by "The Last of the Bummers" and a concert of electronic music by Emmanuel Ghent.