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.

BG012.18

Country / Post Bulgaria
Date of Issue 19 May 2018
Primary theme Religions & beliefs (Christianity)
Subject 25th Anniversary of the United Grand Lodge of Bulgaria
Width 29.0 mm
Height 54.0 mm
Denomination 0.65 BGN
Number in set 2 (show set)
Layout/Format sheet of 40
Perforations 13 by 13
Stamp issuing authority Bulgaria Posts PLC
Printer Bulgarian Philately and Numismatics