The World Association for the Development of Philately (WADP) and the Universal Postal Union (UPU) jointly conceived and developed the WADP Numbering System - WNS, which was launched on 1 January 2002.

XI009.06

Country / Post Montenegro
Date of Issue 15 March 2006
Primary theme Flora (Flowers - General)
Subject Flora - Viola nikolai
Width 41.5 mm
Height 35.0 mm
Denomination 0.50 €
Number in set 2 (show set)
Layout/Format sheet of 20
Perforations 13.5 by 13.5
Stamp issuing authority Montenegro Post
Printer CPU Sarajevo Bosnia & Hercegovina