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.

YT002.09

Country / Post Mayotte
Date of Issue 12 January 2009
Primary theme Energy
History (Geographical history)
Subject Electric Power Plant of Longoni
Width 52.0 mm
Height 31.0 mm
Denomination 0.55 €
Number in set 1
Layout/Format sheet of 25
Perforations 13 by 13
Stamp issuing authority Direction de La Poste de Mayotte
Printer philaposte