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.

EC003.13

Country / Post Ecuador
Date of Issue 8 February 2013
Primary theme Aviation (Aircraft)
Subject 50th Anniversary of TAME Airline
Width 43.5 mm
Height 43.5 mm
Denomination 0.25 USD
Number in set 8 (show set)
Layout/Format miniature sheet of 8 of 8 designs
Perforations 13.5 by 13.5
Stamp issuing authority Correos del Ecuador CDE EP
Printer