Heinz Mack - Lichtgitter, 1981. Original serigraph on paper, signed in pencil and numbered 171/195. Publisher: Prent-Edition, Netherlands, 1981. Small fold & tear to upper left corner, otherwise very good condition, 85 x 70 cm Original silkscreen on paper, signed in pencil and numbered 171/195. Published by Prent-Edition, Netherlands, 1981. Tiny fold & tear on the left upper corner, otherwise in very good condition, 85 x 70 cm