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.

EC010.12

Country / Post Ecuador
Date of Issue 8 June 2012
Primary theme History (Geographical history)
Architecture (Classical)
Subject Seven Wonders of Guayaquil
Width 38.5 mm
Height 27.5 mm
Denomination 0.75 USD
Number in set 7 (show set)
Layout/Format miniature sheet of 7 of 7 designs
Perforations 14 by 14
Stamp issuing authority Correos del Ecuador CDE EP
Printer Instituto Geográfico Militar