100 Pesos San Luis Potosí (Coat of Arms) 2003
Prices updated: August 2026
Union of the States: San Luis Potosí, first stage.
Union of the States: San Luis Potosí, first stage.
Design
Banxico
Reverse
Official coat of arms of the state of San Luis Potosí, 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" in the aluminum-bronze ring. Year of minting on the obverse.
How much is the 100 Pesos San Luis Potosí (Coat of Arms) 2003 worth?
The market value of the 100 Pesos San Luis Potosí (Coat of Arms) 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 inherited or found a large, chunky Mexican coin marked "100 Pesos San Luis Potosí" dated 2003, here is the short answer: it is worth anywhere from a few dollars to around 30 USD or more, and the deciding factor is whether it has a solid silver center. This is not a rare coin, but the silver versions have real value beyond their face value.
The 2003 100 Pesos San Luis Potosí is part of a Mexican series honoring each of the country's states (the Estados series). Mexico's central bank, Banxico, issued one 100-peso coin per state, and San Luis Potosí was in the first release in 2003. This particular version is identified by the state coat of arms (escudo) on the reverse. There is also a separate version with a scenic design, so check which one you have.
What it is (and why the version matters)
This is a bimetallic coin: an outer ring of one metal wrapped around a center core of another. The key detail for value is the core.
- Circulating version: the center is an aluminum-bronze alloy. Face value only. Worth about 5 to 6 USD at the current exchange rate, essentially its 100-peso face value.
- Collector version: the center is .999 fine silver. This is the one that carries a premium and is what collectors actually chase.
Both share the same physical specs, so weight and diameter alone will not always separate them. You need to look at the color and finish of the center disc, and ideally have it checked.
Technical specs
Keep these exact figures to verify authenticity and identify your coin:
| Feature | Detail |
|---|---|
| Denomination | 100 Pesos |
| Year | 2003 |
| State | San Luis Potosí (coat of arms variant) |
| Weight | 33.78 grams |
| Diameter | 39 millimeters |
| Edge | Discontinuous reeded |
| Composition | Bimetallic (silver .999 core in collector version) |
| Mint | Casa de Moneda de México |
How much is it worth in 2026?
Honest ranges, because condition drives everything:
- Circulating (base metal core): roughly face value, around 5 to 6 USD.
- Silver core, circulated or handled: around 20 to 30 USD, tracking the silver content plus a small collector premium.
- Silver core, uncirculated with full original luster and no spotting: can push higher when a collector is completing the full 32-state set, since 2003 pieces are first-year starters for the series.
Do not expect a fortune. These are modern coins with large mintages, not scarce classics. What gives the silver version a floor is the metal itself. Spotting, cleaning marks, or dull surfaces knock the price down fast.
How to tell if yours is silver
The silver center has a brighter, whiter tone and holds a mirror-like or frosted finish in uncirculated pieces. The base-metal center looks more golden or brassy. If you are unsure:
- Weigh it. It should read 33.78 grams on a jewelry scale.
- Measure it. Diameter should be 39 millimeters with a caliper.
- Look at the center color and finish under good light.
- When in doubt, have it verified by a dealer or the community before buying or selling.
How to check authenticity
Fakes usually fail on the physical basics. Compare your coin against the specs above. Warning signs: wrong weight, wrong diameter, flat or mushy relief, and colors that bleed or sit in the wrong place across the two metals. A genuine piece has crisp detail on the coat of arms and a clean boundary between ring and core.
About "error" coins
Genuine mint errors (off-center strikes, die rotation, double strikes) can multiply a coin's value if they are real and verifiable. Most "errors" people post online are actually post-mint damage: dings, scratches, and corrosion that happened after the coin left the mint. Those add nothing. If you think you have a true error, get a second opinion before assuming it is valuable.
Where to sell it
To sell the 2003 100 Pesos San Luis Potosí safely:
- A verified numismatic shop from the Pesoteca dealer directory, which can appraise it on the spot.
- The Pesoteca buy-and-sell forum, where collectors deal directly.
Photograph the obverse, reverse, and edge before you sell, and check the price range on this page first. Avoid dumping it on social media to the first buyer who offers, and be wary of resellers who lowball.
Collecting the full states series? Post your San Luis Potosí piece in the Pesoteca forum and let the community confirm whether you have the silver version or the circulating one before you set a price.
Historical context
The 100-peso Union of the States of the Mexican Republic series started in 2003 with the first stage, called the Coat of Arms stage because the reverse bears the official heraldry of each of the 32 states. The piece dedicated to San Luis Potosí 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.
San Luis Potosí has San Luis Potosí 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 coat of arms of the state, with no allusions to specific historical episodes: the central motif is the heraldic emblem. For mintages and economic circulation data of each piece in the series, the sources are Banxico's official reports; until they are verified in the CM10 catalog, they are not reported in this card.
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 San Luis Potosí shows Saint Louis the King over the Cerro Potosí, a religious reference and the mining industry.
San Luis Potosí was a key mining center of the viceroyalty. The insurgent Pi mint struck 8 reales during the War of Independence.
The historic numismatic distinction of San Luis Potosí is the colonial mint Pi (colonial San Luis Potosí, insurgent 1811-1815), which operated through most of the 19th century and struck silver pieces that are hunted today by Mexican and foreign collectors. That heritage gives San Luis Potosí a strong numismatic tradition that is reflected in the local trade of modern commemorative pieces such as this one.
If you want to hunt this piece down in person or find specialized collectors in San Luis Potosí, check the San Luis Potosí 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 San Luis Potosí, 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 San Luis Potosí have a colonial mint?
Yes, San Luis Potosí had a colonial mint identified as Pi (colonial San Luis Potosí, insurgent 1811-1815). You can review the sibling colonial pieces from the same region in our colonial 8 reales series. The 8 reales from that mint trade today between 800 and 15,000 pesos depending on year, assayer and state of preservation.
What is the difference from the 100 Pesos San Luis Potosí 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 San Luis Potosí.
Where can I buy the 100 Pesos San Luis Potosí 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 San Luis Potosí 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.
The colonial mint of San Luis Potosí (Coat of Arms) 2003
San Luis Potosí (Coat of Arms) 2003 had an operating mint with the mintmark Pi (insurgente) during the 1811-1815 period. The silver pieces struck there, mainly 8 reales from the Independence era and the 19th century, are sought after today by Mexican and foreign collectors.
Notable assayers: IJ (ceca insurgente durante la Guerra de Independencia). Each assayer marked the initials of their name on the design, which allows pieces to be cataloged by year and by assayer mark. A single year can have 3-5 variants depending on the assayer.
You can review related colonial pieces on the example page or in the full 8 reales colonial series.
Key historical event of San Luis Potosí (Coat of Arms) 2003 (1811)
La ceca insurgente de San Luis Potosí (marca Pi) operó durante la Guerra de Independencia. Antes, San Luis fue centro minero clave del virreinato con plata proveniente de las minas de Real de Catorce y Cerro de San Pedro.
UNESCO heritage of San Luis Potosí (Coat of Arms) 2003
San Luis Potosí (Coat of Arms) 2003 is home to the following sites recognized as UNESCO World Heritage:
- ▸ Camino Real de Tierra Adentro (2010)
Circulation and market of San Luis Potosí (Coat of Arms) 2003
Herencia minera colonial con coleccionismo por tradición numismática. Circulación en San Luis capital, Ciudad Valles y Matehuala.
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 100 Pesos San Luis Potosí worth?
It depends on the version. The circulating base-metal version is worth about face value, roughly 5 to 6 USD. The collector version with a .999 silver center is worth around 20 to 30 USD, and an uncirculated silver piece with full original luster can go higher, especially for collectors building the complete 32-state set. Condition drives the price.
Is the 2003 100 Pesos San Luis Potosí rare?
No, it is not rare. It is a modern coin with a large mintage, part of Banxico's series honoring each Mexican state. The silver-core version has value because of its .999 silver content, not scarcity. Only genuine, verifiable mint errors would make an individual piece unusually valuable.
Where can I sell the 2003 100 Pesos San Luis Potosí?
The safest options are a verified numismatic shop from the [Pesoteca dealer directory](/tiendas), which appraises it in person, or the [Pesoteca buy-and-sell forum](/foro/compra-venta) among collectors. Photograph the obverse, reverse, and edge, and check the price range on this page before selling.
How can I tell if my 2003 San Luis Potosí coin is silver?
Check the center core. The silver version has a bright, whitish tone and a mirror or frosted finish, while the base-metal version looks golden or brassy. Confirm the weight is 33.78 grams and the diameter is 39 millimeters. If unsure, have it verified by a dealer or the Pesoteca community.
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Sources
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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