The currency stamps issued on 16 July 2012 were printed on no-watermark paper. However, fluorescent mark was used as a security measure on these stamps. The fluorescent mark is of "T" motif. All the eight hexagon-shaped stamps are fluorescent marked. Due to the position of fluorescent mark on the stamp sheet, three fluorescent varieties have been created for each of the eight stamps - i) fluorescent mark on bottom, ii) fluorescent mark on top and bottom, iii) fluorescent mark on top - with a ratio of 2:1:2.
If you are a variety collector, you should make sure that you have all the fluorescent mark varieties in your collection.