Answer:
The 13 stripes on the flags of the United States of America represent the thirteen (13) original states. The flag with "76" displayed under an arc of 13 seven-pointed stars is known as the Fillmore or Bennington flag. Another unique feature of this flag is that the alternating red-white stripes begin with a white stripe at the top rather than the traditional red stripe.
Supposedly this flag was from the Battle of Bennington, Vermont (August 1777) and was supposedly carried off the field of battle by Nathaniel Fillmore and passed down through generations of the Fillmore family. However, recent comparisons of flag construction, weaving, and materials dates this flag to the War of 1812 era. Regardless, it is an historic flag from one of our Wars with the British and is a very unique design.
The original Bennington flag is in a museum in Bennington, Vermont.