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.

IO002.11

Country / Post British Indian Ocean Territories
Date of Issue 1 March 2011
Primary theme Royalty & Monarchies
Subject HM Queen Elizabeth II - A Lifetime of Service
Width 35.0 mm
Height 35.0 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