The stamp is part of the set “Shells and Marine Snails”, which was issued on June 11, 2007. It depicts the shell Murex margaritensis.
I am Florian, a 36-year-old cover collector from Austria. I am trying to receive at least one cover from every country of the world. If your country is on the list of missing countries, please send me a cover, I am replying with a nice-stamped one from Austria!