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.

IN009.11

Country / Post India
Date of Issue 12 February 2011
Primary theme Aviation (Aviation Pioneers)
Post & Philately (Philatelic Exhibitions)
Subject Indipex 2011 - 100 Years of Airmail
Width 32.0 mm
Height 58.0 mm
Denomination 5.00 INR
Number in set 4 (show set)
Layout/Format sheet of 4 of 4 designs
Perforations 13 by 13
Stamp issuing authority Ministry of Communications Department of Posts
Printer India Security Press, Nasik
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