#12 is "Nature Protection" - Tara Mountain:

issued on 15 November 2006, design by J. Simonovic, printed in Sarajevo on 105 gr paper, perforated like usually 13 1/4, in printing sheet of 20 numbered.

1 value, face 0.40 euro, and selling by dealer for 0.60 euro/stamp, if someone need block of four corner with number need to prepare 3.20 euro, and for FDC will need 1.65 euro.

Quantity is same in "frame" of 30 000 pieces, with message on FDC really "in center"!!!

Eyeglass in green leaf with text "factor 100%" - think that many people know about what is talking.