inscribed in fibre-tipped pen l.l.: 3/15 inscribed in fibre-tipped pen l.r.: Matthew Sleeth (underlined) inscribed in fibre-tipped pen on reverse l.l.: 3/15 inscribed in fibre-tipped pen on reverse l.c.: UNTITLED #7 from OPFIKON, 1997 / PRINTED BY MS – JUNE 2004 / Matthew Sleeth (underlined)