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.

ES062.17

Country / Post Spain
Date of Issue 10 July 2017
Primary theme Science & Technology (Information Technology)
Telecommunications
Subject The 70's Generation - Discovery of fibre optics
Width 48.5 mm
Height 27.5 mm
Denomination 0.60 €
Number in set 4 (show set)
Layout/Format miniature sheet of 4 of 4 designs
Perforations 13 by 13
Stamp issuing authority Correos Y Telegrafos SA
Printer RCM-FNMT
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