![](https://www.t-o-m-b-o-l-o.eu/wp-content/uploads/2013/04/tumblr_mcf1rxtHrO1ru82ue1.jpg)
Karel Martens
Untitled, circa 1991
letterpress monoprint on catalogue card from the Stedeljk Museum Amsterdam, artist Richard Long
11 Âœ Ă 8 Âčââ in. (291 Ă 205 mm)
![](https://www.t-o-m-b-o-l-o.eu/wp-content/uploads/2013/04/tumblr_mcf1yyf6IR1ru82ue.jpg)
Karel Martens
Untitled, 1991
letterpress monoprint on catalogue card from the Stedelijk Museum Amsterdam
11 Ÿ Ă 8 ÂŒ in. (297 Ă 210 mm)
![](https://www.t-o-m-b-o-l-o.eu/wp-content/uploads/2013/04/tumblr_mcf27l5jTR1ru82ue1.jpg)
Karel Martens
Untitled, 1994
letterpress monoprint on paper
8 â·ââ Ă 12 Âœ in. (225 Ă 319 mm)