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.

BG006.18

Country / Post Bulgaria
Date of Issue 17 April 2018
Primary theme Religions & beliefs (Christianity)
Subject 900th Anniversary of the Medieval Templars Order
Width 29.0 mm
Height 54.0 mm
Denomination 2.50 BGN
Number in set 1
Layout/Format miniature sheet of 1
Perforations 13 by 13
Stamp issuing authority Bulgaria Posts PLC
Printer Bulgarian Philately and Numismatics