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.

TZ081.09

Country / Post Tanzania
Date of Issue 31 August 2009
Primary theme Fauna (Mammals)
Subject Wild Animals of Tanzania - Female Hippopotamus with baby
Width 42.58 mm
Height 28.45 mm
Denomination 600 TZS
Number in set 18 (show set)
Layout/Format miniature sheet of 6 of 6 designs
Perforations 14 by 14
Stamp issuing authority Tanzania Posts Corporation
Printer Joh Enschedé Security Printers