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.

BG019.18

Country / Post Bulgaria
Date of Issue 15 August 2018
Primary theme Military (Military events)
History (History of Peoples)
Subject 1300 Years since the Victory of Khan Tervel over the Arab Army - Siege of Constantinople on August 15th, 718
Width 53.0 mm
Height 43.0 mm
Denomination 2.00 BGN
Number in set 1
Layout/Format miniature sheet of 1
Perforations 13 by 13
Stamp issuing authority Ministry of Transport, Information Technologies & Communications
Printer Bulgarska Philatelia & Numismatika