A Mexican Coat of Arms
This Mexican Coat of Arms seems to be from between 1820-1830. The image as a whole with the nopales below was the one used for the 1824 Constitution. The image, with the coat of arms and the nopales with the names of the States, was not commonly used, even less so after 1830.
In one of the nopales it contains the state of “Sonora an Sinaloa” as a single one; they separated in 1830. Also in the “nopales” you can see the name Alta California, which was composed of what is now California and Arizona. Also included are New Mexico and “Coahuila y Texas. After 1847, these territories were taken from Mexico by the U.S.