On August 28, 2008, Pos Malaysia issued modern arts stamps (click
here to see the whole set of stamps). All the stamps are SPM watermarked. However, the 30 sen stamp (see the image below) has two different watermarks - upright and inverted. It is said that the inverted watermark one is less common.
Spirit of Ledang by Syed Ahmad Jamal (2003); painted using acrylic on canvas