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.

EE031.06

Country / Post Estonia
Date of Issue 11 October 2006
Primary theme Literature, Press and Comics (Writers)
Subject Centenary of birth of Poetess Betti Alver
Width 44.5 mm
Height 36.5 mm
Denomination 4.40 EEK
Number in set 1
Layout/Format sheet of 20
Perforations 13 by 13
Stamp issuing authority Estonian Post
Printer AS VABA MAA Tallinn
Connect to the web shop of the issuing stamp authority