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.

YT010.09

Country / Post Mayotte
Date of Issue 29 June 2009
Primary theme Minerology & Geology (Mountains & Geological features)
Geography & Meteorology (Seas, lakes & rivers)
Subject The Four Brothers
Width 80.0 mm
Height 30.0 mm
Denomination 0.56 €
Number in set 2 (show set)
Layout/Format miniature sheet of 2 of 2 designs
Perforations 13 by 13
Stamp issuing authority Direction de La Poste de Mayotte
Printer philaposte