100 Pesos Oaxaca (Coat of Arms) 2003
Prices updated: August 2026
Union of the States: Oaxaca, first stage.
Union of the States: Oaxaca, first stage.
Design
Banxico
Reverse
Official coat of arms of the state of Oaxaca, 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 Oaxaca (Coat of Arms) 2003 worth?
The market value of the 100 Pesos Oaxaca (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 heavy two-tone Mexican 100 Pesos coin with a state emblem on the back, here is the fast answer: the 2003 Oaxaca 100 Pesos carries a real sterling silver center, so it has a built-in floor value tied to its silver content, usually a few dollars over melt. A pristine, uncirculated example in original packaging is worth more, but this is not a rare coin that trades for hundreds of dollars unless it is a certified high grade or a verified mint error.
This piece belongs to the first stage of Mexico's "Union of the States" series, a 32-coin set (one for each Mexican state plus the capital) issued by Banco de México with a satin finish. The reverse shows the official coat of arms of Oaxaca: a shield with a chain and feathers, a nod to the state's mixed Spanish and pre-Hispanic heritage.
What it's actually worth in 2026
Value on these bimetallic 100 Pesos coins comes from two things: the silver in the center disc, and the grade (condition). The center is .925 sterling silver, which is where the floor price lives. The coin is not scarce, tens of thousands were struck, so age alone adds almost nothing.
| Condition | Approx. value (USD) |
|---|---|
| Circulated | 8 to 15 (close to silver melt) |
| Uncirculated (BU) | 15 to 30 |
| Original mint packaging / proof-like | 25 to 45 |
| Certified high grade (MS68+) | Can reach 60 to 100+ |
These are collector ranges for the standard coin. If you are holding one, the realistic answer is that most examples land in the 10 to 30 USD band. Treat any listing claiming hundreds of dollars with suspicion unless it is professionally graded (NGC or PCGS) at the top of the population.
Specifications (keep these exact)
Use these numbers to verify what you have. Fakes almost always miss on weight or diameter.
- Denomination: 100 Pesos
- Weight: 33.78 grams
- Diameter: 39 mm
- Composition: bimetallic, sterling silver .925 center, aluminum-bronze outer ring
- Edge: discontinuous reeded (characteristic of the whole family)
- Obverse: Mexican national coat of arms inside the silver center, with the "100 Pesos" denomination
- Reverse: official coat of arms of the state of Oaxaca
- Year: 2003 (first stage of the series)
The obverse design is shared across all 32 coins in the set, so the state emblem on the reverse is what tells them apart.
The silver floor: why it can't be worthless
Because the center disc is genuine sterling silver (.925 fineness), this coin always has a minimum value tied to the silver spot price. That is the reason a worn example still sells for several dollars instead of pocket change. The outer ring (aluminum-bronze) carries no precious metal value. So when you estimate worth, you are really pricing the silver core plus a small collector premium.
How to tell if yours is genuine
- Weigh it. A jewelry scale should read 33.78 grams. Off by more than a gram or two and something is wrong.
- Measure it. A caliper should read 39 mm across.
- Check the relief and color split. Genuine pieces have crisp detail and a clean line between the silver center and the bronze ring. Fakes tend to look flat, with muddy or uneven color separation.
- Look at the edge. It should show the discontinuous reeding of this family. A smooth or fully continuous edge is a red flag.
If the numbers match, you almost certainly have a real coin.
About "error" coins
Genuine mint errors (off-center strikes, die rotation, doubled strikes) can multiply the value of a piece. But most "errors" people post online are post-mint damage: dings, scratches, or corrosion, not factory errors. If you think you have a true error, get a second opinion before you believe a big number.
The Oaxaca connection worth knowing
Oaxaca has real numismatic weight beyond this modern coin. The colonial insurgent mint marked Oa (Oaxaca, 1811 to 1814) struck silver during Mexico's War of Independence. Those colonial 8 reales are the genuinely collectible Oaxaca pieces, trading anywhere from roughly 40 to 800 USD depending on year, assayer, and condition. If you are chasing real value from the region, that is the series to study, not the modern 100 Pesos. You can browse the full catalog in the colonial 8 reales series.
In 2005, Banco de México issued a companion Oaxaca Cultural 2005 coin as part of the second stage of the series, this time with a state-specific cultural motif instead of the official coat of arms. Together the two coins complete the 100 Pesos pair dedicated to Oaxaca.
Where to sell it
Don't dump it to the first Facebook buyer. To get a fair price, use a verified numismatic shop from the Pesoteca directory, which can appraise it on the spot, or the Pesoteca buy-and-sell forum where collectors trade directly. If you're near the region, the Oaxaca shops hub lists vetted dealers with honest reviews. Photograph the obverse, reverse, and edge, and check the range in this page before you agree to anything.
Have one sitting in a drawer and not sure which stage of the series it is from? Post clear photos in the Pesoteca forum and the community will help you pin down the grade and value.
Historical context
The 100-peso "Union of the States of the Mexican Republic" series 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 Oaxaca 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.
Oaxaca has Oaxaca de Juárez 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 state's official coat of arms, with no reference to specific historical episodes: the central motif is the heraldic emblem. For mintages and circulation economic 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 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 Oaxaca shows a shield with a chain and feathers, a Hispanic-pre-Hispanic heritage of the state.
Oaxaca is the birthplace of Benito Juárez and Porfirio Díaz, key 19th-century presidents. The insurgent Oa mint struck 8 reales during the War of Independence.
The historic numismatic distinction of Oaxaca is the colonial mint Oa (colonial Oaxaca, insurgent 1811-1814), which operated through most of the 19th century and struck silver pieces that are hunted today by Mexican and foreign collectors. That heritage gives Oaxaca 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 Oaxaca, check the Oaxaca 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 Oaxaca, 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 Oaxaca have a colonial mint?
Yes, Oaxaca had a colonial mint identified as Oa (colonial Oaxaca, insurgent 1811-1814). 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 Oaxaca 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 Oaxaca.
Where can I buy the 100 Pesos Oaxaca 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 Oaxaca 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 Oaxaca (Coat of Arms) 2003
Oaxaca (Coat of Arms) 2003 had an operating mint with the mintmark Oa (insurgente) during the 1811-1814 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: TH (ceca insurgente operativa 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 Oaxaca (Coat of Arms) 2003 (1811-1814)
La ceca insurgente de Oaxaca operó durante la Guerra de Independencia bajo control de fuerzas de José María Morelos. Sus emisiones son piezas históricas raras y muy cotizadas por coleccionistas de la Independencia.
UNESCO heritage of Oaxaca (Coat of Arms) 2003
Oaxaca (Coat of Arms) 2003 is home to the following sites recognized as UNESCO World Heritage:
- ▸ Centro histórico de Oaxaca y zona arqueológica de Monte Albán (1987)
Circulation and market of Oaxaca (Coat of Arms) 2003
Ciudad Patrimonio UNESCO con coleccionismo cultural. Comercio numismático activo en Oaxaca de Juárez con Compra de Monedas Antiguas DizaR como referencia.
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 Oaxaca coin worth?
Most examples are worth about 10 to 30 USD, driven mainly by the sterling silver (.925) center. A worn coin sits near its silver melt value, an uncirculated piece brings 15 to 30 USD, and a professionally certified top grade (MS68+) can reach 60 to 100 USD or more. It is not a rare coin, so age alone adds little.
Is the 2003 100 Pesos Oaxaca coin rare?
No. It is part of a widely issued 32-coin "Union of the States" set, with tens of thousands struck. Its value comes from the real silver center plus a small collector premium, not scarcity. The genuinely rare Oaxaca pieces are the colonial insurgent 8 reales (mint mark Oa, 1811 to 1814).
How can I tell if my 100 Pesos Oaxaca coin is genuine?
Weigh it (should be 33.78 grams) and measure it (39 mm) with a jewelry scale and caliper, then compare to the specs on this page. Genuine coins have crisp relief, a clean color line between the silver center and bronze ring, and the family's discontinuous reeded edge. Fakes usually miss the weight or look flat and muddy.
Where can I sell the 2003 100 Pesos Oaxaca coin?
Use a verified numismatic shop from the Pesoteca directory for an on-the-spot appraisal, or the Pesoteca buy-and-sell forum to trade with collectors directly. Photograph the front, back, and edge, and check the value range here first. Avoid selling to the first random online buyer for less than it's worth.
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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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