Sol LeWitt (1928-2007)

Sol LeWitt (1928-2007)
Untitled
signed with initials 'SL' (lower centre); and dated '18.1.1993' (lower right)
ink on the verso of a postcard (Sol LeWitt, Kubus, 1984)
10 x 14 cm.
Executed in 1993;
and Three other similar inks on postcards by the same hand. (4)