2007 41¢ American Flag
Issue Date: August 15, 2007
City: Washington, DC
Printed By: Banknote Corporation of America for Sennett Security Products
Printing Method: Lithographed
Perforations: Serpentine die cut 11 vertically
U.S. #4187 can be distinguished from its look-alikes by the “USPS” microprinted on the left side of the flag pole and its vertical perf 11 serpentine die cut.