Karel Martens
Untitled, circa 1991
letterpress monoprint on catalogue card from the Stedeljk Museum Amsterdam, artist Richard Long
11 ½ × 8 ¹⁄₈ in. (291 × 205 mm)

Karel Martens
Untitled, 1991
letterpress monoprint on catalogue card from the Stedelijk Museum Amsterdam
11 ¾ × 8 ¼ in. (297 × 210 mm)

Karel Martens
Untitled, 1994
letterpress monoprint on paper
8 ⁷⁄₈ × 12 ½ in. (225 × 319 mm)