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.

CZ031.19

Country / Post Czech Republic
Date of Issue 2 October 2019
Primary theme Aviation (Pilots)
History (World War I & II)
Subject Czechoslovak Pilots in the Royal Air Force
Width 45.0 mm
Height 54.0 mm
Denomination E
Number in set 2 (show set)
Layout/Format miniature sheet of 2 of 2 designs
Perforations 12 by 12
Stamp issuing authority Czech Post
Printer Post Printing House
Connect to the web shop of the issuing stamp authority