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.

MX001.12

Country / Post Mexico
Date of Issue 26 January 2012
Primary theme Fauna (Cetaceans)
Subject Joint issue with Korea - Gray Whale
Width 48.0 mm
Height 40.0 mm
Denomination 13.50 MXN
Number in set 2 (show set)
Layout/Format sheet
Perforations 13.5 by 13.5
Stamp issuing authority Servicio Postal Mexicano
Printer Talleres de Impresion de Estampillas y Valores