10 Pesos Silver 2004: 180th Anniversary of the Federation

If you inherited or found a large silver Mexican 10 pesos dated 2004, you have a 1 troy ounce silver coin, not pocket change. This is a modern proof commemorative for the 180th Anniversary of the Union of the States into a federation. In 2026, its value starts at the silver melt price (roughly 30 dollars for a full ounce, tracking spot silver) and climbs from there for clean proof examples with original packaging.

What you actually have

This is not the small everyday 10 peso coin used in Mexico today. Those are bimetallic (a brass ring around a steel-nickel center) and worth about 50 US cents. Your coin is a heavy silver commemorative, and the difference matters a lot for value.

Here are the specs that confirm it:

• Metal: Silver, .999 fine (99.9% pure silver)
• Weight: 31.1 grams (exactly 1 troy ounce)
• Diameter: 40 mm
• Edge: Reeded (grooved)
• Finish: Proof (mirror-like fields with frosted, satin raised designs)
• Mint: Casa de Moneda de México (the Mexican Mint, operating continuously since the 16th century)
• Catalog reference: KM# 683

The "proof" finish is the giveaway that this was made for collectors, not for circulation. If yours has that mirror-and-frost look and came in a capsule or presentation case, that is exactly how it was sold.

What it's worth in 2026

Because the coin is one full ounce of nearly pure silver, it has a price floor: melt value. No matter the condition, a genuine example is worth at least what an ounce of silver trades for on that day. As of recent silver prices, that floor sits around 30 US dollars, and it moves with the market.

Above melt, value depends on condition and packaging:

These are collector-market ranges, not fixed prices. A coin certified by NGC or PCGS in a top proof grade sells for a premium because the grade is guaranteed and the coin cannot be swapped or altered inside the sealed holder.

Is it rare?

Modern Mexican silver commemoratives like this are collectible, but they are not scarce enough to command four-figure prices on their own. The real drivers here are the silver content and the proof quality. A raw example with fingerprints and toning spots is worth close to melt. A pristine, certified example earns a genuine premium from collectors who want the coin in the best possible state.

Do not expect a life-changing figure. This is a solid silver piece with a modest collector premium, and that is an honest assessment.

How to tell if yours is genuine

The fastest checks use the specs above:

1. Weigh it. A real example is 31.1 grams. Use a jewelry scale. A significant deviation is a red flag.
2. Measure it. Diameter should be 40 mm. Use calipers.
3. Check the edge. It should be reeded (grooved), not smooth or lettered.
4. Inspect the strike. Genuine proofs have crisp, frosted raised designs against mirror fields. Fakes often look flat, dull, or grainy.

Be suspicious of any offer priced well below the silver melt value. A silver coin selling for less than its metal is a warning sign, not a bargain. When in doubt, third-party grading from NGC or PCGS both authenticates and grades the piece.

Where to sell it

Because this is a precious-metal coin, sell where the buyer will show you the piece and confirm its weight before money changes hands:

• A verified coin shop from the Pesoteca directory can appraise and pay you on the spot, sorted by location.
• The Pesoteca buy-and-sell forum connects you directly with collectors, which often beats a dealer's offer for a clean example.

Before you sell, photograph the obverse, reverse, and edge in good light, and compare your coin's condition to the ranges above. Avoid dumping it to the first bidder on social media, and never sell below the day's silver melt value.

Got one of these silver commemoratives sitting in a drawer and not sure which grade it falls into? Post clear photos on the Pesoteca forum and let the community help you pin down its value.

10 pesos silver, commemorative of the 180th Anniversary of the Union of the States of the Republic into a federation, 2004, State of Tamaulipas. An issue of the Banco de México within the first stage of the commemorative series dedicating each coin to a Mexican federal state. The listing declares piece number AN 00, indicating a collection-series numbering. Tamaulipas was formally incorporated as a state in 1824, and its reverse shows elements representative of the state coat of arms with reference to the coastal geography of the Gulf and the region's cattle-raising activity. Official weight close to 31.10 grams with silver fineness 0.925. Under the presidency of Vicente Fox in his fourth year of government. That year the Law on Transparency and Access to Public Government Information was passed as part of the institutional modernization of the federal regime. The complete 180th Anniversary series serves as a material reminder of the original federative pact of 1823-1824, the founding moment of the contemporary Mexican political system. Collectible pieces for the specific state design and for the symbolic weight of the federal commemorative project.