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.

IO001.07

Country / Post British Indian Ocean Territories
Date of Issue 29 March 2007
Primary theme Fauna (Fish)
Subject Parrotfish - Common Parrotfish
Width 42.0 mm
Height 28.0 mm
Denomination 0.54 GBP
Number in set 6 (show set)
Layout/Format miniature sheet of 6 of 6 designs
Perforations 13.5 by 13.5
Stamp issuing authority British Indian Ocean Territory Administration
Printer BDT International Security Printers