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.

US002.19

Country / Post United States of America
Date of Issue 17 January 2019
Primary theme Holy Days & Celebrations (Chinese New Year)
Subject Lunar New Year - Year of the Boar
Width 40.0 mm
Height 25.0 mm
Denomination Forever
Number in set 1
Layout/Format self adhesive miniature sheet of 12
Perforations 11 by 11
Stamp issuing authority United States Postal Service
Printer