100 Pesos Tamaulipas Silver Coin (2007): Value & Facts

If you inherited a large, heavy Mexican coin marked "100 Pesos" with an eagle on one side and a state emblem on the other, you likely have a 100 Pesos Tamaulipas from 2007. The honest answer up front: most examples trade for roughly 25 to 60 USD, driven mostly by the silver inside, not by extreme rarity.

This is one of the more interesting modern Mexican coins because it is not just base metal. The center ring is actual silver, which gives the coin a hard price floor no matter what condition it is in.

What this coin actually is

The full name is the 100 Pesos "Unión de los Estados en una Federación" (Union of the States in a Federation), Tamaulipas issue, second stage. Tamaulipas is one of Mexico's 31 states, and this coin belongs to a long commemorative series that honored each state on its own coin.

Mexico ran two versions of this state series. The important one for value is the silver version, and the Tamaulipas piece is part of it.

Key specifications:

• Denomination: 100 Pesos
• Year: 2007 (single year of issue for this design)
• Weight: 33.94 grams
• Diameter: 39 millimeters
• Composition: bimetallic, with a silver center ring
• Edge: discontinuous reeded (interrupted milling)
• Obverse theme: Tamaulipas state arms, second stage of the series

The silver content is what matters most to a US seller. The center core is .999 fine silver, and this is the coin that gives the series a bullion floor. Because of that silver, even a worn or scratched example is worth real money for the metal alone, unlike most modern circulation coins.

How much is it worth in USD

Value comes down to condition and whether you still have the original Banco de México packaging.

Condition	Typical value (USD)	Notes
Circulated / handled	25 to 35	Silver floor holds it up
Uncirculated (no packaging)	35 to 50	Clean surfaces, full luster
Original Banxico blister/set	45 to 60	Sealed packaging adds a premium
Certified high grade (NGC/PCGS MS66+)	60 to 100+	Top graded examples pull the highest prices

These are collector market ranges. The exact number moves with the silver spot price, since the coin carries a meaningful silver weight in its core. When silver rises, the floor on this coin rises with it.

Official mintage figures for this specific issue are not clearly published, which tells you it was struck in limited numbers, often for numismatic sets rather than heavy circulation. Low, undocumented mintages support the collector premium, but they have not turned this into a four-figure rarity. Anyone telling you a common 2007 Tamaulipas 100 Pesos is worth thousands is inflating it.

Is it rare?

Moderately collectible, not genuinely rare. The whole state series is popular with collectors who try to complete all 31 pieces, and that steady demand keeps prices firm. But it is not a key date, and it does not break records. Its real strength is the combination of steady collector interest plus the silver floor underneath it.

How to tell if yours is genuine

Start with the physical measurements. A real one weighs 33.94 grams and measures 39 millimeters across. Put it on a jewelry scale and a caliper. If your coin is lighter or a different diameter, be suspicious.

Other checks:

• Compare the relief against official Banco de México images. Counterfeits tend to look flat and mushy in the fine detail.
• Examine the two-tone metal. The silver center and the outer ring should be cleanly separated, not painted or plated.
• Check the edge. It should show the discontinuous reeding described above.

For a coin in this price range, professional certification from NGC or PCGS is the definitive answer. It confirms authenticity and grade in one step, and a certified coin sells faster and for more. For a single common example, careful measurement plus good photos is usually enough.

Where to sell it

Best options for a US or international seller:

1. A verified numismatic dealer. Use the Pesoteca dealer directory to find one that appraises on the spot without a middleman markup.
2. The Pesoteca buy-and-sell forum, where you deal directly with collectors who actually want the state series.
3. Online marketplaces, but with caution. eBay and similar sites can bring good prices, but they also carry the most counterfeits, so buyers will scrutinize your photos.

Before listing, photograph the obverse, reverse, and edge, and weigh the coin so you can quote 33.94 grams. Avoid dumping it to the first Facebook offer. Because of the silver content, never sell it for less than its metal value.

Not sure which version of the state series you actually have, the silver one or the base-metal one? Post clear photos and the weight in the Pesoteca forum and the community will identify it for you.

The entry dedicated to Tamaulipas came out in 2007 as part of the third and final wave of the Cultural phase, together with Sonora and Tabasco. Banxico called this second stage Emblematic Motifs and replaced the state coat of arms with a specific cultural symbol.

The reverse of the piece shows the Tamaulipas fisherman with a cast net facing the Laguna Madre, a lagoon-estuary system that is the second largest coastal lagoon on the American continent. The Laguna Madre runs 200 kilometers parallel to the Gulf of Mexico in the north of the state. Its hypersalinity makes it a refuge for migratory birds such as the northern pintail, the white-fronted goose, and the white pelican, and a fishing zone for shrimp, blue crab, and oyster. It was declared a Protected Natural Area in 2005 for its ecological and economic value to the communities of La Pesca and Matamoros.

State context: Tamaulipas was established as a state on February 7, 1824. Its capital, Ciudad Victoria, was founded by Jose de Escandon in 1750 as part of the colonization of Nuevo Santander. The state borders Texas for more than 370 kilometers and its main ports are Tampico and Altamira.

In the Mexican numismatic market the Cultural phase circulated less than the Escudo 2003 and today is usually found in higher grades because it reached the streets late. The official Banxico mintages for this piece are not always published in the Economic Information System, but the figure reported for circulation tends to be around 250,000 pieces per state in the Cultural phase. Always confirm against the catalog of the complete 100 pesos States series before closing a large purchase.

The sister Escudo 2003 of Tamaulipas is part of the first phase of the series, with the official state coat of arms on the reverse. Hunting both pieces completes the set dedicated to Tamaulipas.