Knoebel, Imi Mariner 1996/97 Signed and dated in pencil and in red and blue on the reverse: imi 96,97 Upper left corner with scuff marks 152 x 159 x 12 cm 59 7/8 x 62 5/8 x 4 3/4 in. Acryl auf Aluminiumplatte und 22 Aluminium-Vierkant-rohren