75/3579 Caris, G. (b.1925). "Structure C2" and "... C6". Two tinted silkscreens, printed in black, white and grey, both 63,5x46,5 cm., signed "Gerard Caris", titled, "74" or "75 and "33/60" or "A/P" in pencil. - AND 1 col. geometrical silkscreen by M. COHEN (signed "Mark Cohen" and "244/400" in pencil).