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.

SH009.11

Country / Post St Helena
Date of Issue 29 January 2011
Primary theme Royalty & Monarchies
Politics & Government
Subject Revolution to Restoration - Dissolution of Parliament
Width 28.0 mm
Height 42.0 mm
Denomination 0.50 SHP
Number in set 10 (show set)
Layout/Format miniature sheet of 10 of 10 designs
Perforations 14 by 14
Stamp issuing authority St Helena Post Office
Printer