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.

MX021.09

Country / Post Mexico
Date of Issue 14 September 2009
Primary theme Environment & Conservation (Global Warming)
Minerology & Geology (Mountains & Geological features)
Subject Preservation of Polar Regions and Glaciers
Width 40.0 mm
Height 40.0 mm
Denomination 10.50 MXN
Number in set 2 (show set)
Layout/Format sheet
Perforations 13 by 13
Stamp issuing authority Servicio Postal Mexicano
Printer Talleres de Impresion de Estampillas y Valores