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.

SM001.12

Country / Post San Marino
Date of Issue 29 February 2012
Primary theme Fauna (Fish)
Subject Centenary of Milano Marittima
Width 30.0 mm
Height 40.0 mm
Denomination 1.00 €
Number in set 1
Layout/Format sheet of 12
Perforations 14 by 14
Stamp issuing authority République de Saint Marin
Printer Österreichische Staatsdruckerei GmbH