Depicts the seal of the United Mexican States.

The Seal of the United Mexican States is a modified version of the national coat of arms, with the addition of the full official name of the country Estados Unidos Mexicanos, in a semi-circular accommodation in the upper part of the seal. Current and past Mexican peso coinage have had the seal engraved on the obverse of all denominations.

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).

At the center, the image of the reverse of colonial Mexico coin, 8 Reales 1732 (KM# 103), Philip V of Spain; at the upper side, parallel to the coin frame, the legend NUMISMATIC HERITAGE OF MEXICO; on the left side, the Mexican mint mark, while on the right field is the $100.

The arrival of the Borbons to the Spanish throne brought about a profound transformation and modernization of the Empire. In 1732, during the second reign of Philip V, minting underwent a significant change with the introduction of the flying press in Mexico, which permitted the production of round coins with a protective cord. That is how coins of worlds and seas came into being whose fine ore and beauty made the Mexican coin the main medium of international payment.

Philip was the first member of the House of Bourbon to rule as king of Spain. The sum of his two reigns, 45 years and 21 days, is the longest in modern Spanish history.