1809 Mexican 8 Reales Silver Coin: Value & How to Sell

If you inherited an 1809 Mexican 8 Reales, here is the honest answer: even the most worn example is worth its silver, roughly 0.75 troy ounces, which puts a floor of about 18 to 22 USD on it at current spot prices. A clean, collectible example can bring 100 to 400 USD or more, and top-grade certified pieces go higher. The date and mint matter, and so does condition.

This is one of the most historically significant silver coins ever struck: the Spanish colonial 8 Reales, the coin the world called the "Spanish dollar" or "piece of eight." It was the global trade currency for centuries, and the Mexico City mint (Casa de Moneda de México) was its biggest producer.

What you actually have

Your coin is an 8 Reales dated 1809, struck at the Mexico City mint during the Spanish colonial period. It carries the assayer initials TH (the assayer was the official who certified the silver content). It was minted in the opening months of the Mexican War of Independence, when control of the mints shifted between royalist and insurgent forces.

Key specs, exactly as cataloged:

• Metal: Silver, 0.900 fine (90 percent silver)
• Weight: 26.15 grams
• Diameter: 38 mm
• Edge: Incuse (impressed lettering/design)
• Catalog reference: KM#200

That weight and fineness give it about 23.5 grams of pure silver, roughly 0.75 troy ounces. That is your guaranteed minimum, the melt value. No genuine example is worth less than that.

What it's worth in 2026

Value on this coin is driven by condition first, then by any scarce assayer or overdate variety. This was a heavily circulated trade coin, so most surviving examples are worn. Well-worn pieces trade close to melt. The jump comes with sharper detail and original surfaces.

Condition	Approximate value (USD)	Notes
Heavily worn (Good/VG)	20 to 40	Trades near silver melt
Moderate wear (Fine/VF)	50 to 150	Design clear, some detail
Light wear (XF/AU)	150 to 500	Strong detail, minor rub
Uncirculated / certified MS	500 and up	Scarce, best pieces bring the most

These are ranges, not promises. An exact figure depends on the grade, eye appeal, and whether your specific variety is scarce. Certified examples (graded by NGC or PCGS) sell for more because buyers trust the grade and authenticity.

A note on countermarks

Some 8 Reales of this era carry a countermark (a small stamp added later, over the original design). The Manuel Salcedo monogram countermark is one example, applied to authorize the coin for use in a specific region. A genuine, documented countermark can add value to the right collector. Most "stamps" people ask about, though, are damage or graffiti, not official countermarks. If yours has extra markings, get it verified before assuming they add value.

The myth: "it's 200 years old, it must be worth a fortune"

Age alone does not make a coin valuable. Millions of 8 Reales were struck at Mexico City over the decades, and plenty survive. What actually moves the price is grade (how much original detail remains), authenticity, and genuine scarcity of the date and assayer combination. A common date in worn condition is a silver coin with a history, worth its metal plus a modest premium, not a jackpot.

That said, this is a real silver colonial coin with strong collector demand worldwide. It is never "just pocket change."

How to tell if yours is genuine

Counterfeits of colonial 8 Reales exist, including cast fakes and modern replicas. Check these before buying or selling:

1. Weigh it. A jewelry scale should read close to 26.15 grams. A fake in the wrong alloy will be off, often lighter.
2. Measure it. Diameter should be about 38 mm.
3. Check the edge. Genuine pieces have an incuse (impressed) edge design, not a plain or seam-marked edge.
4. Study the engraving. Look at the mint mark, the assayer initials (TH), and the sharpness of the portrait and shield. Casts look soft and mushy.
5. Be suspicious of any deal far below silver value. If someone offers to sell a "rare" 8 Reales for a few dollars, it is almost certainly fake.

For a firm answer, submit it to NGC or PCGS, or take it to a numismatic dealer who can examine it in person.

Where to sell it

Because this is a precious-metal coin, sell to someone who will show you the piece and its weight, and verify before you pay. Your safest options:

• A verified numismatic shop from the Pesoteca directory, which can appraise it on the spot.
• The Pesoteca buy-and-sell forum, where collectors deal with collectors.

Before you sell, photograph the front, back, and edge, and compare against the values in this page. Do not dump it to the first buyer on social media, and never sell below silver melt.

Have an 1809 8 Reales with an unusual countermark or assayer mark you can't identify? Post clear photos on the Pesoteca forum and let the community help you pin down the variety and its value.

This 8 reales silver piece corresponds to 1809, amid the pre-revolutionary conspiracies of the Mexican War of Independence. In 1809 the armed war had not yet broken out, but it was brewing in the Conspiracy of Valladolid led by José Mariano Michelena. The crisis in Spain due to the Napoleonic invasion and the Bayonne abdications weakened the viceregal government, run that year by Pedro de Garibay and then by Archbishop Francisco Javier de Lizana y Beaumont as interim ruler.

The Mexican Mint (mark Mo) continued operating under royalist control throughout the war. Founded in 1535, it was the official mint of the Spanish Crown and the only one authorized to strike full pesos of international circulation under the viceregal system. Issuing side: royalist (Crown control). The silver fineness was .903 and the theoretical weight 27.07 grams, within the octaval system inherited from the viceroyalty.

The 1809 issues, prior to the armed outbreak, are hunted by collectors of the dynastic crisis. The Mexico City mint struck under the Fernando VII bust standard set by decree of the Supreme Central Junta of Seville, with the effigy of the king then held captive by Napoleon at Valençay.

In the numismatic market they are hunted by collectors of military history and the origins of the nation. When buying one-to-one, verify the authenticity of the planchet and the declared mint. Many common pieces are sold as "war rarities" without being so: consult the Krause reference before accepting a middleman's premium.