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.

RO021.18

Country / Post Romania
Date of Issue 27 February 2018
Primary theme Architecture (Classical)
Subject Madrigal Choir, 55 years - Marin Constantin, founder and mentor
Width 33.0 mm
Height 48.0 mm
Denomination 8.00 RON
Number in set 1
Layout/Format sheet of 32 & 8
Perforations 13 by 13
Stamp issuing authority SC Romfilatelia SA
Printer Fabrica de timbre
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