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.

EC001.16

Country / Post Ecuador
Date of Issue 31 March 2016
Primary theme Education
History (Geographical history)
Subject Yachay City of Knowledge 2016
Width 37.5 mm
Height 28.0 mm
Denomination 2.00 USD
Number in set 1
Layout/Format sheet of 100
Perforations 13.5 by 13.5
Stamp issuing authority Correos del Ecuador CDE EP
Printer Instituto Geográfico Militar