100 Pesos Nayarit (2005): Value of the Bimetallic Silver Coin

If you inherited a large, heavy two-tone Mexican coin marked "100 pesos" with Nayarit on it, here's the honest answer: it's not a rare collector rarity, but it isn't pocket change either. The silver center gives it a real value floor, usually in the range of 15 to 30 USD depending on the silver market, with pristine sealed examples going higher.

This is one of the 100 Pesos States series coins, part of a large Mexican program celebrating the country's federation. Nayarit is a Mexican state, and this coin belongs to the second (cultural) phase of that series, struck in 2005.

What it actually is

The 100 Pesos Nayarit is a bimetallic coin: a silver center inside a base-metal ring. That silver center is what matters for value. Unlike most modern face-value coins, this piece contains real precious metal, so it will never be worth less than its melt value.

Here are the exact specs, which you can use to check authenticity:

Feature	Detail
Denomination	100 pesos
Year	2005
Weight	33.94 grams
Diameter	39 mm
Composition	Bimetallic (silver center, base-metal ring)
Edge	Discontinuous reeded
Series	Union of the States, cultural phase (Nayarit)

The obverse (front) shows the Mexican national coat of arms: an eagle devouring a serpent while perched on a cactus. This design is shared across the entire 100 pesos States series, so it's the reverse that identifies your coin.

The reverse (back) carries a cultural motif representing Nayarit, which may be architecture, wildlife, an archaeological site, or traditional dress. Confirm the exact design against the Banxico (Bank of Mexico) catalog before you list it, since each state in the series has its own reverse.

What it's worth in USD

Value comes from two things here: the silver content and condition.

• Circulated / handled: roughly 15 to 25 USD, tracking the silver spot price. The silver center is the price floor.
• Uncirculated, loose: around 25 to 35 USD.
• Sealed in the original Banxico blister pack: the best examples command a premium above melt, often 40 USD or more, because collectors want the untouched packaging.

These are not million-dollar coins, and any listing claiming otherwise is inflating a common commemorative. What you have is a solid, silver-backed piece with a dependable resale value, not a rarity.

The myth to ignore

Social media routinely claims large modern Mexican "100 pesos" coins are worth thousands. For this Nayarit issue, that is false. It's a widely available commemorative, and the honest ceiling for a normal example is set by its silver plus a modest collector premium. The only way one of these breaks past that is a genuine, verifiable mint error, and real mint errors are rare.

Does it have valuable errors?

Genuine mint errors (off-center strikes, die rotation, double strikes) can multiply the value of a coin like this. But most "errors" people spot are post-mint damage: dings, corrosion, or a scratched surface, none of which add value. If you think you have a true error, post clear photos to the Pesoteca forum so experienced members can weigh in before you get excited about it.

How to tell if yours is genuine

Counterfeits of silver bimetallic coins do exist. Check these first:

1. Weigh it. A genuine coin is 33.94 grams. Use a jewelry scale. A fake often comes in light or heavy.
2. Measure it. Diameter should be exactly 39 mm. Use calipers.
3. Inspect the strike. Real coins have crisp, sharp relief. Fakes look flat or mushy, and the color separation between center and ring can look wrong.
4. Check the edge. The genuine coin has a discontinuous reeded edge, not a smooth one.

When in doubt, use our coin grading guide to assess condition and read the details correctly.

Where to sell it

To sell for a fair price, skip the first buyer on social media. Your safer options:

• A verified numismatic shop in the Pesoteca directory, searchable by city, that will appraise it on the spot.
• The Pesoteca buy-and-sell forum, where collectors trade directly.

Before listing, photograph the obverse, reverse, and edge, note whether you have the original Banxico blister, and check the value ranges above so you know what a fair offer looks like.

Got a full box of Mexican coins besides this one? Post photos in the Pesoteca forum and let the community help you sort the silver from the spenders.

The entry dedicated to Nayarit belongs to the first wave of the Cultural phase, issued in 2005 along with most of the set. 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 Wixarika or sikuli god's eye, woven in a cross with colored yarn and used as a votive offering by the Huichol people. The sikuli is a ceremonial weaving that represents the power to see and understand the unknown according to the Wixarika worldview. It is made on two crossed sticks with yarn dyed red, blue, yellow, and green, each color associated with sacred cardinal points. It is offered at peyote sanctuaries and in the kalihueys or community temples.

State context: Nayarit was established as a state on February 5, 1917, after being the Territory of Tepic since 1884. Its capital, Tepic, preserves the largest active Wixarika community along with Jalisco and Durango. The name honors the Cora leader Nayar, who led resistance against the Spanish until 1722.

In the Mexican numismatic market, the Cultural phase circulated less than the Coat of Arms 2003 and today is usually found in higher grades because it reached the streets 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 full 100 pesos States series before closing a large purchase.

The Nayarit Coat of Arms 2003 sister is part of the first phase of the series, with the state's official coat of arms on the reverse. Hunting down both pieces completes the set dedicated to Nayarit.