These three anniversary covers commemorate the tragic event of The Empire of Japan's WWII sneak attack on the U.S. Naval Base at Pearl Harbor, Hawaii. The cachet designs and hand-stamped cancellations showcase patriotic themes with a focus on military and war.  The unaddressed covers are in very fine (VF) grade condition and have been previously used. They were produced in the United States and originate from the state of Hawaii. The multi-color designs make these covers a beautiful addition to any collection.  Please see the scan for further details.