Method and device for authentication of first day of issue stamps

摘要

A method for first day of issue authentication of sheets of original stamps containing a selvage edge integrally formed with the sheet of stamps during printing wherein the method comprises affixing an extra original stamp of the same issue as the sheet of original stamps being authenticated in-line with an exposed portion of the selvage edge, a First Day of Issue cancellation seal then is applied to the exposed portion of the selvage edge in a manner such that the bulls eye and a portion of the killer bar segments containing the first day of issue notice is applied directly to the selvage edge and only the terminal ends of the killer bar extend to and cancel the extra original stamp.