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.

RS058.11

Country / Post Serbia
Date of Issue 19 December 2011
Primary theme Energy (Hydro)
Subject 100 Years of "Moravica" Hydroelectric Power Plant in Ivanjica
Width 35.0 mm
Height 31.9 mm
Denomination 22 CSD
Number in set 1
Layout/Format sheet of 25
Perforations 13.25 by 13.25
Stamp issuing authority Public Enterprise of PTT Srbija
Printer Forum Novi Sad