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.

IO001.03

Country / Post British Indian Ocean Territories
Date of Issue 17 March 2003
Primary theme Fauna (Marine fauna)
Subject Sea slugs - Halgerda tesselata
Width 60.0 mm
Height 25.0 mm
Denomination 0.02 GBP
Number in set 6 (show set)
Layout/Format sheet
Perforations 13 by 13
Stamp issuing authority British Indian Ocean Territory Administration
Printer BDT International Security Printers