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.

EC022.16

Country / Post Ecuador
Date of Issue 25 October 2016
Primary theme Engineering (Dams)
Energy (Hydro)
Subject Coca Codo Sinclair Hydroelectric Plant
Width 38.0 mm
Height 28.0 mm
Denomination 1.75 USD
Number in set 3 (show set)
Layout/Format sheet of 100
Perforations 14 by 14
Stamp issuing authority Correos del Ecuador CDE EP
Printer Instituto Geográfico Militar