100 Pesos Aguascalientes 2003 (State Seal): Value Guide
Prices updated: August 2026
Union of the States: Aguascalientes, first stage.
Union of the States: Aguascalientes, first stage.
Design
Banxico
Reverse
Official coat of arms of the state of Aguascalientes, with perimeter legend "ESTADOS UNIDOS MEXICANOS". Reverse of the first stage of the series Union of the States of the Mexican Republic.
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 Aguascalientes 2003 (State Seal): Value Guide worth?
The market value of the 100 Pesos Aguascalientes 2003 (State Seal): Value Guide 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 two-tone Mexican coin marked 100 pesos with a state seal on the back, here is the straight answer: the silver center gives it a floor value of roughly 12 to 18 USD in melt, and most examples trade for 20 to 40 USD depending on condition. This is not a rare coin, but it is real silver, so it is worth more than face value.
This piece belongs to the Aguascalientes issue of the "Unión de los Estados de la República Mexicana" series (Union of the States of the Mexican Republic), a set of 32 coins minted by the Bank of Mexico (Banxico), one for each state plus the federal district. The 2003 first stage carries the official state coat of arms on the reverse. For Aguascalientes, that seal shows a dam framed by grapes and gears, symbolizing the state's agriculture and industry.
What it's actually worth in 2026
Value here is driven by two things: silver content and grade. The coin is not scarce, so do not expect a windfall.
- Silver content (the floor): the center is Sterling silver, .925 fine. That gives it a melt value that moves with the spot silver price, currently in the 12 to 18 USD range.
- Circulated examples: typically 20 to 30 USD from collectors and coin shops.
- Uncirculated / original satin finish: 30 to 50 USD when the surfaces are clean and the two-tone contrast is sharp.
- Full 32-coin set: complete sets in nice condition sell for a premium over the sum of parts, since assembling all states takes effort.
| Item | Year | Typical value (USD) | Notes |
|---|---|---|---|
| 100 Pesos Aguascalientes (state seal) | 2003 | 20 to 40 | Common, real silver center |
| Same, uncirculated satin | 2003 | 30 to 50 | Clean surfaces, sharp two-tone |
| Melt (silver center only) | 2003 | 12 to 18 | Moves with spot silver |
| Full 32-coin Union of States set | 2003 to 2006 | Premium over parts | Demand from set collectors |
Technical specs (use these to verify it)
- Weight: 33.78 grams
- Diameter: 39 mm
- Composition: bimetallic. Center is Sterling silver, .925 fine. Outer ring is aluminum-bronze.
- Edge: interrupted reeding, a signature of this coin family.
- Obverse: shared across all 32 coins, the Mexican national coat of arms inside the silver center with the denomination "100 Pesos."
The silver center is the whole reason this coin carries value. The outer ring is base metal and adds almost nothing.
Is it rare? No, and here's why
These were issued as official commemoratives, not scarce error coins. Plenty survive because collectors bought them to complete the state set. "Old" or "large" does not mean rare. What would make yours worth real money is a genuine, verifiable mint error: an off-center strike, die rotation, or a true doubled strike. Be skeptical. The vast majority of "errors" people post online are post-mint damage, dings, scratches, and corrosion, not factory mistakes. If you think you have a real error, get it looked at before you assume it's valuable.
How to tell if yours is genuine
- Weigh it. A jewelry scale should read close to 33.78 grams. Counterfeits often miss the weight.
- Measure it. A caliper should read 39 mm. Wrong diameter is a red flag.
- Check the relief and color split. Genuine pieces have crisp detail and a clean line between the silver center and the bronze ring. Flat, mushy detail or bleeding color between metals points to a fake.
- Look at the edge. The interrupted reeding is hard to fake well.
Where to sell it
- A verified coin dealer will grade and value it on the spot. Browse the Pesoteca shop directory for Aguascalientes or the full dealer directory to find one near you.
- The Pesoteca buy-and-sell forum connects you directly with collectors, which usually beats a dealer's buy price for common silver.
- Before you sell anything, photograph the obverse, reverse, and edge, and check the value range above. Don't dump it on the first social media offer.
There is also a companion piece: in 2005 Banxico released the Aguascalientes Cultural 100 pesos as part of the second stage, showing a specific cultural motif instead of the state seal. Together, the two Aguascalientes coins complete the full state pairing that set collectors chase.
Got one sitting in a drawer and not sure what it is? Post clear photos on the Pesoteca forum and let collectors confirm the grade and whether yours has anything unusual.
Historical context
The 100 pesos series Union of the States of the Mexican Republic began in 2003 with the first stage, called the Coat of Arms stage because the reverse bears the official arms of each of the 32 states. The piece dedicated to Aguascalientes 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 Nuevos Pesos reform of 1993.
Aguascalientes has Aguascalientes as its capital. It was established as a free and sovereign state in 1857. The reverse of the piece shows the official coat of arms of the state, without 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 listing.
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 Aguascalientes shows a dam among grapes and gears, an allegory of the state's industry and agriculture.
Aguascalientes takes its name from the region's hot springs. It is home to the San Marcos National Fair, one of the oldest in Mexico.
Aguascalientes 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 Aguascalientes during its first stage.
If you want to hunt this piece down in person or find specialized collectors in Aguascalientes, check the Aguascalientes 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 Aguascalientes, 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 Aguascalientes have a Mexican colonial mint?
No, Aguascalientes 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 Aguascalientes 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 Aguascalientes.
Where can I buy the 100 Pesos Aguascalientes 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 Aguascalientes 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 Aguascalientes 2003 (State Seal): Value Guide not have a colonial mint?
Aguascalientes 2003 (State Seal): Value Guide 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 Aguascalientes 2003 (State Seal): Value Guide 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 Aguascalientes 2003 (State Seal): Value Guide on other Mexican coins
Beyond the official coat of arms that appears on this 2003 piece, Aguascalientes 2003 (State Seal): Value Guide has other symbols and figures that have been depicted in the official numismatic catalog of Banxico and the Mint:
- 20 pesos Constitución 1917 (2017)
Aguascalientes hospedó la Convención Revolucionaria de 1914, predecesora de la Constitución de 1917.
Key historical event of Aguascalientes 2003 (State Seal): Value Guide (1914)
La Convención de Aguascalientes se instaló el 10 de octubre de 1914 en el Teatro Morelos de Aguascalientes capital. Durante seis semanas, delegados villistas, zapatistas y constitucionalistas debatieron el futuro político de México, aunque la ruptura entre Carranza y Villa impidió llegar a acuerdos definitivos.
Circulation and market of Aguascalientes 2003 (State Seal): Value Guide
Estado industrial con Feria Nacional de San Marcos (abril-mayo), una de las ferias más importantes de México con tradición numismática desde el siglo XIX. Fabricación automotriz Nissan e industria manufacturera. Circulación estable pero pieza relativamente escasa en tiendas locales; aparece más en subastas del Bajío y CDMX. Monedas Maya es la referencia numismática local con rating 4.5.
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 Aguascalientes 100 pesos worth?
It has a real Sterling silver center, so its melt floor is about 12 to 18 USD depending on the silver spot price. Circulated coins usually sell for 20 to 30 USD, and clean uncirculated examples with the original satin finish bring 30 to 50 USD from collectors.
Is the 2003 Aguascalientes 100 pesos rare?
No. It was an official commemorative in the 32-coin Union of the States series, and many survive because collectors saved them to complete the set. It's worth more than face value because of its silver content, not because it's scarce. Only a genuine, verifiable mint error would make it significantly more valuable.
Where can I sell the 2003 Aguascalientes 100 pesos?
A verified coin dealer from the Pesoteca directory will value it on the spot, or you can list it on the Pesoteca buy-and-sell forum to reach collectors directly, which often gets you a better price. Photograph the obverse, reverse, and edge, and check the value range before selling. Avoid taking the first random offer online.
How do I know if my 2003 Aguascalientes 100 pesos is genuine?
Weigh it (should be about 33.78 grams) and measure it (39 mm) with a jewelry scale and caliper, then compare to the specs above. Counterfeits often have the wrong weight or diameter, flat relief, or a poor color line between the silver center and the bronze ring.
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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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