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.

RS052.11

Country / Post Serbia
Date of Issue 25 October 2011
Primary theme Post & Philately (Philatelic Exhibitions)
Subject Stamp Day - Philatelic Exhibition - "Beogradfila"
Width 29.0 mm
Height 35.0 mm
Denomination 46 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