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.

XD013.11

Country / Post Andorra (F)
Date of Issue 1 October 2011
Primary theme National symbols (Coats of Arms)
Subject Carta verda
Width 26.0 mm
Height 32.0 mm
Denomination Carta verda 20g
Number in set 1
Layout/Format sheet of 40
Perforations 13 by 13
Stamp issuing authority LA POSTE
Printer Philaposte Bouzalac France