You might like Left Right A. Black Justin Knowles 1968 B. Black Justin Knowles 1968 C. Red Justin Knowles 1968 A Series of Fifteen Justin Knowles 1974–5 S.149.01 Justin Knowles 2002 S.157iv.01 Justin Knowles 2002 S.26.02 Justin Knowles 2002 Mosaic Relief No. 4 John Ernest 1966 Two Resin Panels with Black (and Space) Justin Knowles 1968–75 Moebius Strip John Ernest 1971–2 WD.01. Systematic resin Panel Quadrants.1.00/74 Justin Knowles 1974–2003 WD.156.(33)ii.01 Justin Knowles 2001