20 Pesos Heroico Colegio Militar (2023): Value in USD

If you have a Mexican 20 Pesos coin marked "Heroico Colegio Militar" dated 1823-2023, here is the honest answer: it is worth roughly 1.50 to 5 USD, not the thousands you may have seen in online ads. It is a modern commemorative that Mexico's central bank struck 5 million times, so it is common. The value comes from condition, not rarity.

In 2026, listings claiming this coin sells for 4,000 or even 150,000 pesos are bait, not real transactions. Nobody is paying that. What follows are the actual figures and how to check what yours is worth.

What this coin is

The Banco de México (Mexico's central bank) issued this coin in 2023 to mark 200 years of the Heroico Colegio Militar, the country's main military officer academy. It is a circulating commemorative, which means it was made to spend, not just to collect. That high production number is why it is not scarce.

It is a bimetallic coin: an outer ring of aluminum bronze and a center of copper-nickel. There is no silver or gold in it, so it has no bullion value. Its worth is purely collector demand, and for a coin this common that demand is modest.

What it's worth in 2026

Condition is the only thing that moves the price on this piece. A worn, circulated example is worth barely more than face value. A crisp uncirculated coin with full luster is worth a few dollars. A coin still sealed in the official Banxico blister pack brings a small premium over a loose one in the same grade.

Condition	Value (USD)	Value (pesos)
Circulated	1.50 to 2.50	25 to 40
Uncirculated (UNC), full luster	3.50 to 5	60 to 90
Sealed Banxico blister	slightly above UNC	slightly above 90

The 90-peso figure is a reference price from a validated purchase in the Pesoteca catalog. For a US reader, that lands under 5 USD. This is a coin you keep because you like it, not one you retire on.

How to identify it

The coin is dodecagonal (twelve-sided), 30 mm across, and weighs 12.67 grams. Key features:

• The crest of the Heroico Colegio Militar in the center of the reverse.
• The legend of the Secretaría de la Defensa Nacional (Mexico's Department of National Defense) with the dates 1823-2023.
• Microtext reading "POR EL HONOR DE MÉXICO" ("For the honor of Mexico") on the left.
• A latent image showing the number 20 on the right, visible when you tilt the coin.

Only the 2023 date exists. There is no rare year variant to look for.

How to tell if yours is genuine

For a modern circulating coin, outright fakes are rare because the coin is not valuable enough to counterfeit. Still, verify with two quick checks:

1. Weight: it should be 12.67 grams on a jewelry scale.
2. Diameter: it should measure 30 mm across the flats with a caliper.

Counterfeits tend to show wrong weight or diameter, flat relief, or the two metal colors misaligned. If yours matches the specs above, it is almost certainly authentic.

About "error coins" worth a fortune

Genuine mint errors (off-center strikes, die rotation, double strikes) can raise the value of a coin if verified. But most "errors" posted on social media are post-mint damage: scratches, dents, corrosion from circulation. Those add nothing. If you think you have a real error, photograph it and post it in the Pesoteca forum for the community to review before you get your hopes up.

Where to sell it

Since this is a common coin, do not expect a bidding war. Your best options:

• A verified coin shop from the Pesoteca shop directory, which can appraise it on the spot without a middleman markup.
• The Pesoteca buy-and-sell forum, directly among collectors.

Photograph the obverse, reverse, and edge, and check the price range on this page before you sell. Do not dump it on the first Facebook offer.

If you collect these modern commemoratives, compare it with the 20 Pesos Mexico-USA Diplomatic Relations 2023 and the 20 Pesos Bicentenario de la Marina - Armada de México 2022.

Got one sitting in a drawer and not sure of its grade? Post clear photos in the Pesoteca forum and let collectors tell you exactly what you have.

On October 11, 1823, with independent Mexico barely in its infancy, the government decreed the creation of the Military College to train the officers of the young national army. It began at the fortress of San Carlos de Perote, Veracruz, and over the years passed through emblematic sites: Chapultepec Castle, Popotla, and, since 1976, Tlalpan in Mexico City.

The "Heroic" surname is no ornament. It was earned in 1847, when the cadets defended Chapultepec against the U.S. invasion: from there springs the legend of the Niños Héroes, etched into the country's civic memory.

That is why Banxico set this piece in motion right at the bicentennial. It entered circulation on October 11, 2023, exactly 200 years after the founding decree, to gather in your pocket two centuries of Mexican military history. Its reverse bears the school's coat of arms and the legend "POR EL HONOR DE MÉXICO", the institution's motto.

Who founded it and the defense of Chapultepec

The 1823 decree was signed by the Minister of War and Navy, General José Joaquín de Herrera, with the idea, promoted by Guadalupe Victoria, of bringing the scattered cadets together in a single school to give them real military training. The "Heroic" surname comes from 1847: during the U.S. invasion, some 800 men defended the hill of Chapultepec against nearly 7,000 invaders under General Winfield Scott. Among them were about 50 cadets of the College, and six died in the defense: Juan de la Barrera, Juan Escutia, Francisco Márquez, Vicente Suárez, Agustín Melgar, and Fernando Montes de Oca, remembered as the Niños Héroes. Escutia is credited with the gesture of wrapping himself in the flag and hurling himself from the heights so it would not fall into enemy hands.

How to identify it

It is a dodecagonal (12-sided) bimetallic of family C1: 30.0 mm in diameter, 12.67 g, a core of silvered alpaca and an aluminum-bronze ring, with a discontinuous reeded edge. The obverse is the National Coat of Arms in relief with "ESTADOS UNIDOS MEXICANOS". The reverse is what makes it unique: at the center is the coat of arms of the Heroic Military College (not a figure or a building), with the legend "SECRETARÍA DE LA DEFENSA NACIONAL BICENTENARIO DEL HEROICO COLEGIO MILITAR, 1823-2023". It carries two security elements worth checking with a loupe: on the left the microtext "POR EL HONOR DE MÉXICO" and on the right a latent image with the number "20" that appears and disappears depending on the angle of light. It exists only with the year 2023.

How much it's worth

This coin circulated, it was not a minimum-mintage or blister-exclusive issue, and many people still find it in their change: it is not rare, not yet. The market range runs from 25 to 90 pesos: circulated with rubs, 25 to 40 pesos; uncirculated (UNC) with luster, 60 to 90; in an official Banxico blister, above a loose UNC. If you saw a post claiming it's worth 150,000 pesos, or that it sells for 4,000, it's bait to get a newcomer to bite. Since it only came out in 2023, it is among the easiest to hunt today and among the ones worth keeping uncirculated now, while they are still cheap. To buy or sell at a fair price, better use the store directory.