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.

PT026.19

Country / Post Portugal
Date of Issue 23 March 2019
Primary theme Economy & Industry
Education
Subject Joint issue Portugal - Armenia - 150th Anniversary of Calouste Sarkis Gulbenkian
Width 40.0 mm
Height 30.6 mm
Denomination 0.53 €
Number in set 2 (show set)
Layout/Format sheet of 50
Perforations 12.25 by 12
Stamp issuing authority CTT Correios de Portugal SA
Printer bpost
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