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.

US006.16

Country / Post United States of America
Date of Issue 29 January 2016
Primary theme National symbols (Flags)
Subject US Flag
Width 22.5 mm
Height 24.5 mm
Denomination Forever
Number in set 2 (show set)
Layout/Format self adhesive booklet of 20
Perforations 12 by imperf
Stamp issuing authority United States Postal Service
Printer