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.

SH004.04

Country / Post St Helena
Date of Issue 19 March 2004
Primary theme Medicine (Famous Medical people)
Subject Famous People in Medicine - Sir Alexander Fleming
Width 31.0 mm
Height 31.0 mm
Denomination 0.50 SHP
Number in set 4 (show set)
Layout/Format sheet of 20
Perforations 14.5 by 14.5
Stamp issuing authority St Helena Post Office
Printer