1 Peso 1998 (Mexico, Bimetallic): What It's Worth

If you inherited or found a 1998 Mexican 1 peso coin, here is the honest answer: in circulated condition it's worth face value, roughly 5 to 10 US cents. A crisp uncirculated example might bring a dollar or two from a collector. This is a common circulating coin, not a rarity, and no version of it is secretly worth thousands.

That said, condition and mint errors can change the picture, and there are a few things worth checking before you spend it or toss it in a jar. Here's what you have and what drives its value.

What this coin actually is

This is a bimetallic 1 peso coin from Mexico, struck in 1998 at the Casa de Moneda de México (the Mexican Mint, mint mark "Mo"). Bimetallic means it has two metals: a stainless steel ring around an aluminum-bronze center, similar in construction to a US Sacagawea dollar or a euro coin. It weighs 3.95 grams and measures 21 millimeters across, with a reeded (grooved) edge.

It belongs to the current New Pesos era. Mexico revalued its currency in 1993 and adjusted the design after 1996, so this coin uses the standard modern layout that's still in circulation today.

• Front (obverse): The Mexican coat of arms, an eagle devouring a serpent while perched on a cactus, in high relief at the center. The legend "ESTADOS UNIDOS MEXICANOS" (United Mexican States, the country's official name) arcs across the top.
• Back (reverse): A large "1" for the denomination at center, the year 1998, and the "Mo" mint mark.

How much is a 1998 1 peso worth?

Be realistic. This coin was produced for everyday spending, so millions exist and most show wear. Value depends almost entirely on condition and whether it's a certified high grade or a verified mint error.

Condition	Realistic value (USD)
Circulated (worn, everyday)	5 to 15 cents (face value)
Uncirculated (no wear, original luster)	1 to 3 dollars
Certified MS-66 or higher (NGC/PCGS)	10 to 40 dollars, depending on demand
Verified genuine mint error	Varies; potentially much higher

The metal itself has no meaningful melt value. Unlike Mexican silver coins such as the Onza Libertad (a 1 troy ounce .999 silver bullion coin) or the gold Centenario (a 50 peso coin holding 37.5 grams of pure gold), this 1 peso is base metal with a floor at face value.

If you're holding older or precious-metal Mexican pieces alongside this one, those are where real money can hide. See our guide to the most valuable Mexican coins to compare.

The one thing that can make it worth more: errors

Genuine minting errors (off-center strikes, die rotation, double strikes, or documented die varieties) can multiply the value of an otherwise common coin. This is the only realistic path to real money with a 1998 1 peso.

Here's the catch: most "errors" people post online are post-mint damage. A coin that was dinged, scratched, corroded, or squeezed in a vending machine is not a mint error and adds no value. A true error happened at the moment of striking. If you think you have one, don't guess. Post clear photos of the front, back, and edge to the Pesoteca forum and let collectors weigh in before you get excited or sell.

How to tell if yours is genuine

Counterfeits of a low-value circulating coin are uncommon, but it's easy to verify:

1. Weigh it. A genuine coin weighs 3.95 grams. Use a jewelry scale.
2. Measure it. The diameter should be 21 millimeters. Use calipers.
3. Check the strike. Real coins have sharp, high-relief detail on the eagle. Fakes tend to look flat or mushy.
4. Look at the two metals. The steel ring and bronze center should be cleanly separated with correct coloring. Poor color blending or a loose center is a red flag.

Most problems people find are wear or damage, not fraud.

Where to sell it

If your coin is ordinary circulated grade, honestly, it's spending money. But if it's a pristine uncirculated example or a suspected error, here are safe options:

• A verified coin shop from the Pesoteca dealer directory. They can appraise and grade it on the spot without overcharging you.
• The Pesoteca buy/sell forum, where you deal directly with collectors who actually want the piece.

Before you sell, photograph the coin (front, back, and edge) and compare it against the value ranges above. Don't dump it on the first Facebook offer. And if it's just a worn everyday coin, remember you can always exchange it at a Mexican bank at face value.

Before deciding what grade yours falls into, run it through our coin grading guide so you're comparing apples to apples.

Got a 1998 peso that looks off-center or unusual? Post your photos in the Pesoteca forum and we'll help you tell a real error from ordinary damage.

When Banxico dropped the N$ prefix from the peso starting in 1996, the circulating pieces kept the same physical format as their Nuevos Pesos equivalents from the decree of June 22, 1992. This 1-peso bimetallic coin struck in 1998 is part of that continuity: same technical specifications, same base design with the National Coat of Arms on the obverse; only the face value visible on the reverse changed. That is why when you line up the dates you see long sequences with very little variation.

For the Mexican collector building a collection by year, these pieces are the ones that fill the basic gaps before hunting down the rare commemorative versions. Banxico has documented mintages in its Monetary Circular CM10 since the year 2000, so for 1998 it is possible to verify the exact mintage against that source. Pesoteca catalogs each year as a distinct physical piece in the PSM System family C, following our convention of one ID per collectible piece, not per shared design.