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.

ET006.04

Country / Post Ethiopia
Date of Issue 27 July 2004
Primary theme Minerology & Geology
Subject Marble - Eshet Blue Marble
Width 40.0 mm
Height 30.0 mm
Denomination 0.75 ETB
Number in set 4 (show set)
Layout/Format sheet
Perforations 14 by 14
Stamp issuing authority Ethiopian Postal Service
Printer Österreichische Staatsdruckerei