The Flag of the Alamo, also known as the 1824 Flag is believed to be the one that flew over the Alamo during the battle there. The date 1824 references the Mexican Constitution of 1824, which the government under President Antonio Lopez de Santa Anna was not honoring.
The 1787 flag is a variation on the Unites States flag, with the date 1787 added, referencing the date of the adoption of the US constitution. (Note: The U.S. Constitution was not finally ratified until 1788.)
Now, I have to say that by referencing the Alamo, I am certainly not advocating any kind of violence or revolution. I designed this flag to represent my support for The United States Constitution and my desire that all elected officials would truly seek to honor and obey it.