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.

SC004.11

Country / Post Seychelles
Date of Issue 1 August 2011
Primary theme Royalty & Monarchies
Subject Wedding of Prince William and Katherine Middleton
Width 28.0 mm
Height 42.0 mm
Denomination 25.00 SCR
Number in set 4 (show set)
Layout/Format sheet of 50
Perforations 14 by 14
Stamp issuing authority Postal Services Division of Seychelles
Printer BDT International Security Printing Ltd