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.

PL001.04

Country / Post Poland
Date of Issue 1 January 2004
Primary theme Geography & Meteorology
Architecture
Subject Polish towns - Sandomierz
Width 31.0 mm
Height 25.0 mm
Denomination 0.50 PLN
Number in set 1
Layout/Format sheet of 100
Perforations 11.6 by 11.9
Stamp issuing authority Polish Post
Printer PWPW Polska Wytwórnia Papierów Wartosciowych
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