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.

RS007.16

Country / Post Serbia
Date of Issue 23 February 2016
Primary theme Minerology & Geology
Science & Technology
Subject 125th Anniversary of the Serbian Geological Society
Width 37.5 mm
Height 30.0 mm
Denomination 23.00 CSD
Number in set 1
Layout/Format sheet of 8
Perforations 13.25 by 13.25
Stamp issuing authority Public Enterprise of PTT Srbija
Printer Zin Belgrade