1810 Mexican 8 Reales with Counterstamps: Value Guide

If you inherited a large silver Mexican coin dated 1810 with strange stamps punched into it, here is the honest answer: most circulated examples trade from roughly 80 to 400 USD, and the extra stamps (counterstamps) can either add value or mean nothing, depending on which government or authority applied them. This is a colonial silver dollar from Spanish Mexico, and a few are worth serious money. Most are not.

In 2026, a plain worn 1810 Mexico City 8 Reales sits near its silver value plus a modest collector premium. The pieces that jump to four figures are the ones with a documented, identifiable counterstamp and strong grade.

What you actually have

The 8 Reales was the Spanish colonial silver dollar, the coin that circulated worldwide and became the basis for the US dollar. This particular type was struck in 1810 in Mexico City (then New Spain), the year the Mexican War of Independence began.

Specifications that matter for authentication:

• Metal: silver, .900 fine (90% pure)
• Weight: 24.74 grams
• Diameter: 40 mm
• Edge: reeded (grooved)
• Mint: Mexico City
• Assayer mark: HJ

A counterstamp (also called a countermark, or resello in Spanish) is a small stamp punched into the coin after it left the mint. Governments across Asia, the Caribbean, and Latin America did this to authorize a foreign silver coin to circulate in their own territory, or to revalidate it during political change. On an 1810 8 Reales, the counterstamp is usually the story that decides the price.

Why the counterstamp changes everything

A counterstamped 1810 8 Reales is really two coins in one: the base silver dollar plus a stamp from wherever it later circulated. Some of those stamps are common and add a few dollars. Others are rare and command a strong premium from specialist collectors who chase a specific issuing country.

1. The base coin (no meaningful counterstamp, worn)

A circulated 1810 Mexico City 8 Reales with heavy wear and only bag marks trades on its silver content plus a small history premium: roughly 80 to 250 USD depending on how much detail survives.

2. Mid-grade with clear detail

An example with sharp detail, good eye appeal, and no problems (holes, cleaning, corrosion) can bring 300 to 800 USD.

3. A rare, identifiable counterstamp

When the stamp ties the coin to a scarce issuing authority, and specialists want it, prices climb to 1,000 USD and up. Documented counterstamped Spanish colonial dollars have sold in the low thousands at major auction houses. The exact figure depends entirely on which country applied the mark and how few survive.

Version	Condition	Typical value (USD)
1810 8R, worn, no notable stamp	Circulated	80 to 250
1810 8R, sharp, problem-free	VF to XF	300 to 800
1810 8R, rare identifiable counterstamp	Any, verified	1,000 and up
Cleaned, holed, or corroded	Any	Silver value only, near 20 to 25 USD

Silver value: the floor under this coin

At 24.74 grams of .900 silver, this coin contains about 0.716 troy ounces of pure silver. That means even a badly damaged example has a hard floor equal to its melt value, which follows the silver spot price. This is the number you fall back on if the coin is cleaned, holed, or otherwise ruined for collectors. It will never be worth less than its silver.

The myths to ignore

"It's from 1810, the year of independence, so it's worth a fortune." Age and a famous date do not equal value. Millions of 8 Reales were struck. Rarity, grade, and the specific counterstamp drive price, not the year on the coin.

"Every stamp on it makes it more valuable." Some marks are damage, not counterstamps. A random scratch, a jeweler's test mark, or corrosion is not a countermark and can lower value. Only a genuine, identifiable official counterstamp adds a premium.

"Shiny means better." A coin someone polished to look bright is usually worth less. Cleaning strips original surfaces and knocks a coin down to silver value. Never clean a coin before selling it.

How to tell if yours is genuine

Colonial silver dollars are among the most faked coins in the world, so check before you celebrate.

1. Weigh it. Genuine pieces are 24.74 grams. A digital scale under it: if it's well off, be suspicious.
2. Measure it. Should be 40 mm across.
3. Check the edge. It should be reeded (grooved), not smooth or seamed. A visible casting seam is a red flag.
4. Ping test. Real .900 silver rings with a high, sustained tone when gently balanced and tapped. A dull, short clunk suggests a fake or a base-metal core.
5. For anything you think is worth over 500 USD, get it certified. Send it to NGC or PCGS (the two major US grading services). They authenticate, grade, and seal the coin, which is the only way to sell a valuable counterstamped piece with full confidence.

If the counterstamp is the reason you think it's valuable, professional grading matters even more, because attribution of which country issued the mark is exactly what specialists pay for.

Where to sell it in the US

• Auction houses (Heritage Auctions, Stack's Bowers): best for a genuine rare counterstamp or a high-grade certified coin. They reach the specialist buyers who pay top dollar.
• Certified coin dealers who handle world and colonial coins: faster, offers a bit under retail, but reliable.
• Get the coin certified first if you believe it's over 500 USD. A raw (uncertified) coin sells for a fraction of what the same coin brings in an NGC or PCGS holder.
• Avoid pawn shops and general "we buy gold" storefronts. They'll pay silver value at best and ignore the collector premium entirely.

Photograph the front (obverse), back (reverse), and the edge in good light before you talk to anyone. Clear photos of the counterstamp are what a specialist needs to give you a real quote.

Got a large silver coin with a stamp you can't identify? Post clear photos of both sides and the counterstamp in the Pesoteca forum and let collectors who chase these pieces tell you what you're holding.

This piece belongs to the category of counterstamps and countermarks applied over already-struck pieces of eight, a practice used by both insurgents and royalists during the War of Independence.

The government of New Spain in 1810 was in the hands of Francisco Javier Venegas, who faced the start of Hidalgo's insurgency on September 16.

The piece belongs to the category of counterstamps and countermarks, punches applied over already-struck pieces of eight to officially revalidate them, move them to another jurisdiction, or mark them with an insurgent or royalist symbol. Each counterstamp carries a political reading: Morelos's crowned M, the seal of Zongolica, the M.V.A., and other families documented in colonial catalogs.

The declared minting origin is: counterstamp over a previously struck piece of eight. The initials HJ that accompany the counterstamp identify the official or commander who authorized the re-marking of the earlier piece.

The Krause catalog references this piece under KM#202.3, useful for cross-checking the entry against international auction listings.

Year of the Grito de Dolores on September 16, the formal start of the Mexican War of Independence.