100 Pesos Nuevo León 2005 (Silver Center): Value Guide

If you inherited or found a 2005 Mexican 100 pesos coin from Nuevo León, here is the honest answer: it is worth money, but not a fortune. Most examples trade in the range of roughly 25 to 60 US dollars, driven mostly by the silver center and condition. Pristine, uncirculated pieces sit at the top of that range.

This is a modern collector coin, not a rare antique, so do not expect a windfall. The value is real and stable because of its silver content and because it belongs to a 32-coin set that collectors work hard to complete.

What this coin actually is

The 100 Pesos Nuevo León is a bimetallic coin: an outer ring of base metal wrapped around a silver center (the "núcleo"). It weighs 33.94 grams and measures 39 millimeters across, making it a large, heavy coin that feels substantial in hand. The edge has a discontinuous reeded pattern, meaning the grooves are broken up rather than running all the way around. That edge is one of the easiest features to check by touch and sight.

The reverse shows designs tied to the identity of the state of Nuevo León, part of a standard format the Mexican Mint (Casa de Moneda de México) used across the whole state series.

Why it has value: the "Estados" series

This piece belongs to the second phase of the Mexican states commemorative series, known as the cultural phase ("fase cultural"). In this phase the coin's center is silver. In the first phase, the center was gold, which is why those earlier coins are worth far more.

Each of Mexico's 32 states got its own coin with imagery linked to its heritage. Collectors chase the full set of 32, and that demand is what keeps individual coins like Nuevo León liquid. It is one of the more accessible coins to start that collection, which is exactly why beginners buy it.

What it's worth in 2026

Value comes down to two things: the silver in the center, and the grade (condition). A coin with full mint luster and no handling marks sells for meaningfully more than one that circulated or was stored carelessly.

Item	Detail
Coin	100 Pesos Nuevo León (Cultural phase)
Year	2005
Composition	Bimetallic, silver center
Weight	33.94 g
Diameter	39 mm
Edge	Discontinuous reeded
Typical value (USD)	~25 to 60, condition-dependent

Do not confuse this with the gold-center coins from the first phase of the series. Those are the ones worth several hundred dollars and up, because of the gold. If your center is silver-colored, you have the cultural phase, and the figures above apply.

The myth to ignore

A modern coin from 2005 is not "old" in numismatic terms, and being from Mexico does not make it a hidden treasure. The value here is grounded in silver content and set demand, not age or rarity. Anyone claiming a common 2005 states coin is worth thousands is selling a story, not a coin.

How to tell if yours is genuine

Weigh it on a jewelry scale and measure the diameter with a caliper. It should hit 33.94 grams and 39 millimeters. Fakes usually miss on weight or diameter, show flat, mushy relief, or have the two metal colors bleeding into each other where the ring meets the center. Check the discontinuous reeded edge too, a smooth or fully continuous edge is a red flag.

Where to sell it

To sell safely, use a verified coin shop from the Pesoteca dealer directory, where you get an in-person appraisal on the spot, or the Pesoteca buy-and-sell forum among collectors. Photograph the obverse, reverse, and edge, and check the price range on this page before you sell. Avoid dumping it to the first bidder on social media.

Working on the full 32-coin states set, or unsure whether yours is silver or gold center? Post clear photos in the Pesoteca forum and let the community confirm the phase before you buy or sell.

The entry dedicated to Nuevo León belongs to the first wave of the Cultural phase, issued in 2005 along with most of the set. Banxico called this second stage Motivos Emblemáticos and replaced the state coat of arms with a specific cultural symbol.

The reverse of the piece shows the Cerro de la Silla, a monolithic limestone formation of 1,820 meters that dominates the Monterrey valley. The Cerro de la Silla is a Natural Monument declared by presidential decree in 1991 and an identity symbol of Monterrey since the 19th century. It was formed by tectonic uplifts of the Upper Cretaceous and its four peaks, Antena, Norte, Sur, and La Virgen, can be seen from across the metropolitan area. It is one of the most climbed hills in northeastern Mexico.

State context: Nuevo León was established as a state on May 7, 1824. Its capital Monterrey was founded by Diego de Montemayor in 1596 and is today the country's third city by population. Cradle of modern Mexican steel with Fundidora founded in 1900 and an industrial hub of the northeast since the Porfiriato.

In the Mexican numismatic market the Cultural phase circulated less than the 2003 Escudo and today is usually found in higher grades because it reached the street late. Banxico's official 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 Nuevo León 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 Nuevo León.