2007 41¢ American Flag
Issue Date: August 15, 2007
City: Washington, DC
Printed By: Ashton-Potter (USA) Ltd
Printing Method: Lithographed
Perforations: Serpentine die cut 9 ½ vertically
U.S. #4186 can be distinguished from look-alikes by a small “USPS” microprinted on the right side of the flagpole and its perpendicular corners.