Depicts coat of arms of Mexico with the inscription forming a semicircle above it.

The coat of arms depicts a Mexican golden eagle perched on a prickly pear cactus devouring a rattlesnake. To the people of Tenochtitlan this would have strong religious connotations, but to the Europeans, it would come to symbolize the triumph of good over evil (with the snake sometimes representative of the serpent in the Garden of Eden).

Value in the centre surrounded by the assayer's initials, fineness and mintmark above and oak and laurel wreath below.