100 Pesos Coahuila (Escudo) 2003
Prices updated: August 2026
Union of the States: Coahuila, first stage.
Union of the States: Coahuila, first stage.
Design
Banxico
Reverse
Official coat of arms of the state of Coahuila, with the perimeter legend "ESTADOS UNIDOS MEXICANOS". Reverse of the first stage of the Union of the States of the Mexican Republic series.
Obverse
Mexican National Coat of Arms within the silver center, with the denomination "100 PESOS" and the legend "ESTADOS UNIDOS MEXICANOS" on the aluminum-bronze ring. Year of minting on the obverse.
How much is the 100 Pesos Coahuila (Escudo) 2003 worth?
The market value of the 100 Pesos Coahuila (Escudo) 2003 is not yet documented with enough data to give a firm range. Weigh and measure your piece, compare it against the specifications, and check the forum for a second opinion.
The real price depends on four factors: the grade of preservation (a circulated piece is worth the low end of the range; an uncirculated one, or one still in its official blister pack, the high end), the finish (satin vs mirror/proof), the rarity within the series based on the mintage, and the metal spot price on the day of the deal when the piece is silver or gold. Check the value-by-grade table above and compare with equivalent pieces before buying or selling.
Where to buy or sell this coin?
Browse the national directory of numismatic shops or the community forum to trade directly with other collectors.
States of the Federation
The 64 pieces of the 180th Anniversary series
This coin is part of the series that dedicated one piece to each Mexican state. Two phases: Heraldic (2003) and Cultural (2005-2007).
Description
If you found a heavy two-tone Mexican coin marked "100 pesos" with a coat of arms showing oak trees, dragons, and a lion, you have a 2003 Coahuila 100 pesos. The good news: it has a real silver center, so it carries a hard metal floor. The reality check: this is a modern commemorative, not a rarity, and most examples trade for roughly USD 20 to 45 depending on condition.
What it's actually worth in 2026
This coin belongs to a 32-piece set Mexico's central bank (Banco de México, or Banxico) issued honoring each state of the republic. That means it was made in reasonable quantities and is not scarce. Value comes almost entirely from two things: its silver content and its grade.
The center disc is Sterling silver (0.925 fineness), which gives every one of these a bullion floor. Circulated or lightly handled examples usually sell in the USD 20 to 30 range, tracking the silver value plus a small collector premium. Clean, uncirculated coins with original satin finish and no scratches move higher, into the USD 35 to 50 range. Certified high-grade examples (graded MS-67 or better by NGC or PCGS) can reach USD 60 to 100, but those are the exception.
| Condition | Approx. value (USD) | What it means |
|---|---|---|
| Circulated / handled | 20 to 30 | Near silver melt value |
| Uncirculated (satin, no marks) | 35 to 50 | Full collector value |
| Certified MS-67+ | 60 to 100 | Top-grade, sold by grade |
Do not expect "thousands." Social media posts claiming modern Mexican state coins are worth fortunes are inflating them. The honest figure is the silver value plus a modest premium.
The silver is the reason to keep it
Here are the numbers that matter, and they are worth verifying on your own coin:
- Total weight: 33.78 grams
- Diameter: 39 millimeters
- Center: Sterling silver, 0.925 fineness
- Outer ring: aluminum-bronze (not silver, not gold)
- Edge: interrupted reeding, a family trait of the series
Only the center disc is silver. The gold-colored ring is aluminum-bronze and has no precious metal value. Even so, the silver core alone keeps this coin well above face value permanently.
What it is and how to identify it
The front (obverse) shows Mexico's national coat of arms (an eagle on a cactus devouring a serpent) inside the silver center, with the denomination "100 pesos." This front is shared across all 32 coins in the set, so it does not tell you which state you have.
The back (reverse) is what identifies it. The Coahuila coat of arms shows oak trees with dragons and a lion. This 2003 issue is the "escudo" (coat of arms) type from the first phase of the series. Coahuila is a northern border state next to Texas, with Saltillo as its capital.
If your Coahuila coin instead shows a cultural or landmark design rather than the coat of arms, you likely have the 2005 Coahuila Cultural 100 pesos, the second-phase sister coin. Owning both completes the two-coin Coahuila pairing.
How to check if yours is genuine
Counterfeits of these bimetallic coins do exist, and the fastest checks are physical:
- Weigh it. A jewelry scale should read 33.78 grams. A coin that is noticeably light or heavy is suspect.
- Measure the diameter. It should be 39 millimeters. Use calipers if you have them.
- Look at the strike. Genuine coins have crisp, raised detail. Flat, mushy relief or blurry lettering points to a fake.
- Check the two-tone split. The silver center and the aluminum-bronze ring should be cleanly defined, not smeared or oddly colored.
Most "error" coins people post online are just post-mint damage (nicks, corrosion, wear), not mint errors. Genuine mint errors (off-center strikes, die rotation, doubling) can raise value, but they must be verified. If you think you have one, post clear photos for review.
Where to sell it
To sell for a fair price, avoid dumping it to the first Facebook buyer. Your best options:
- A verified coin shop from the Pesoteca shop directory, which can appraise it on the spot. If you are in the region, check the Coahuila shop hub.
- The Pesoteca buy-and-sell forum, where collectors trade directly and you can gauge real demand.
Before you sell, photograph the obverse, reverse, and edge, and compare your coin's weight and grade against the ranges above. For a coin like this, condition is the difference between silver-melt money and a real collector premium.
Got a Coahuila 100 pesos and not sure if it's uncirculated or just clean? Post your photos on the Pesoteca forum and let the community grade it.
Historical context
The 100 pesos Union of the States of the Mexican Republic series began in 2003 with the first stage, called Escudo because the reverse bears the official coat of arms of each of the 32 states. The piece dedicated to Coahuila is part of that first block of 32 coins, issued by Banxico under the framework of the Monetary System that has governed the modern peso since the new pesos reform of 1993.
Coahuila has Saltillo as its capital. It is one of the original states of the Federal Pact of 1824, signed on January 31 of that year. The reverse of the piece shows the official state coat of arms, without allusions to specific historical episodes: the central motif is the heraldic emblem. For mintages and economic circulation data for each piece of the series, the sources are the official Banxico reports; until they are verified in the CM10 catalog they are not reported in this entry.
This piece belongs to the era
Nuevos Pesos y actualidad →Explore all the Mexican coins of this era, their historical context and how they connect to the monetary system of the period.
Go deeper on this coin
100 pesos de los Estados: la moneda de plata dedicada a tu estado (guía completa Escudo y Cultural)
Banxico acuñó una moneda de plata para cada uno de los 32 estados de México, y luego lo hizo dos veces. Aquí está la guía completa de las 100 pesos de los Estados: qué son, la diferencia entre la versión Escudo y la Cultural, por qué el centro de plata importa, cómo armar la colección y la lista de las 64 fichas para que caces la de tu tierra.
Read the full article →Unique context of this piece
The coat of arms of Coahuila shows oaks among dragons and a lion, a reference to northern strength and territory.
Coahuila was the cradle of the Mexican Revolution. Here Francisco I. Madero called to arms in the Plan de San Luis from his hacienda in Parras.
Coahuila did not have a colonial mint during the Mexican viceroyalty, but it joined Banxico's official commemorative program when the Bank of Mexico made the "Union of the States of the Mexican Republic" series official in 2003. This bicolor 100-peso piece is the first and only official coin dedicated specifically to the state of Coahuila during its first stage.
If you want to hunt this piece down in person or find specialized collectors in Coahuila, check the Coahuila store hub, where we document the state's verified stores with honest reviews, addresses and contact details.
If you collect the full series, your next target is the Cultural 2005 sibling of Coahuila, struck two years later with a state-specific iconographic motif instead of the official coat of arms. The full 100 Pesos States series also has the complete catalog with every sibling piece verified by Pesoteca.
Related pieces and hubs
Specific questions about this piece
Did Coahuila have a Mexican colonial mint?
No, Coahuila did not have a colonial mint during the viceroyalty. The active Mexican colonial mints were Mexico City (Mo, the most important), Zacatecas (Zs), Guadalajara (Ga), Guanajuato (Go), Durango (Do), Chihuahua (CH), Oaxaca (Oa, insurgent), San Luis Potosí (Pi, insurgent) and a few others of lower volume. You can see the full catalog in our colonial 8 reales series.
What is the difference from the 100 Pesos Coahuila Cultural 2005?
The Coat of Arms 2003 version (this one) shows the state's official coat of arms on the reverse. The sibling Cultural 2005 version shows an iconographic motif representative of the state (a historical figure, a monument, a cultural element) instead of the coat of arms. Both share the bimetallic format and composition. Collecting both is what completes the 100 Pesos set of Coahuila.
Where can I buy the 100 Pesos Coahuila Coat of Arms 2003 today?
The main circuit for pieces in this series is the specialized numismatic market: auction houses, verified stores in the state, and private collectors. In the Coahuila store hub we document the local options with honest reviews. For UNC pieces or those with the original Banxico blister pack, the price rises between 3x and 8x the 100-peso face value.
Why did Coahuila not have a colonial mint?
Coahuila did not have an operating mint during the Spanish viceroyalty. The active Mexican colonial mints were Mexico City (Mo, the most important and oldest on the continent), Zacatecas (Zs), Guadalajara (Ga), Guanajuato (Go), Durango (Do), Chihuahua (CH), Oaxaca (Oa, insurgent) and San Luis Potosí (Pi, insurgent).
The main reason was economic: mints were only established in regions with enough silver mining output to justify the infrastructure. The silver circulating in Coahuila during the colonial era came mainly from the central Mexico City mint. That is why this bicolor 100-peso piece from 2003 is the first official coin dedicated specifically to the state.
Figures and symbols of Coahuila on other Mexican coins
Beyond the official coat of arms that appears on this 2003 piece, Coahuila has other symbols and figures that have been depicted in the official numismatic catalog of Banxico and the Mint:
- 5 pesos Bicentenario Independencia Vicente Guerrero 2010
Aunque Guerrero era del sur, la Revolución en Coahuila fue liderada por Madero.
Key historical event of Coahuila (1910)
Francisco I. Madero proclamó el Plan de San Luis desde su hacienda familiar en Parras, Coahuila, el 5 de octubre de 1910. Ese plan llamó al levantamiento armado del 20 de noviembre que inició la Revolución Mexicana.
Circulation and market of Coahuila
Circulación importante en Saltillo, Torreón y Piedras Negras. Coleccionismo activo por herencia de la Revolución.
Other denominations from 2003
180 Aniversario de la Unión de los Estados en una Federación · Bimetálica
Same denomination, other years
100 pesos Bimetálica · 180 Aniversario de la Unión de los Estados en una Federación
Frequently asked questions
How much is the 2003 Coahuila 100 pesos worth?
Most examples sell for roughly USD 20 to 30 when circulated, tracking the value of the Sterling silver center. Clean uncirculated coins with original satin finish reach USD 35 to 50, and certified MS-67 or better examples can bring USD 60 to 100. Value is driven mainly by silver content and grade, not rarity.
Is the 2003 Coahuila 100 pesos rare?
No. It is one of 32 coins in Banco de México's state-honoring series, issued in reasonable quantities. It is not scarce. Its value comes from the real Sterling silver (0.925) center, not from rarity. Ignore posts claiming modern state coins are worth thousands.
Where can I sell my 2003 Coahuila 100 pesos?
Sell through a verified coin shop in the [Pesoteca directory](/tiendas), which can appraise it in person, or the [Pesoteca buy-and-sell forum](/foro/compra-venta) among collectors. Photograph the obverse, reverse, and edge, and check the grade before selling. Avoid dumping it to the first online buyer.
How can I tell if my Coahuila 100 pesos is genuine?
Weigh it (should be 33.78 grams) and measure the diameter (39 millimeters) with a jewelry scale and calipers. Genuine coins have crisp, raised detail and a cleanly defined silver center with an aluminum-bronze ring. Wrong weight, flat relief, or smeared colors point to a fake.
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Images for informational and educational purposes, attributed to their original source. Reference values; the real price depends on the grade, the specific variant and demand.
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