Mexico 100 Pesos 1984 (Carranza): Value Guide

If you found a Mexican 100 pesos coin dated 1984 with a bearded man on it, here is the honest answer: in worn, circulated condition it is worth a few cents to about a dollar. This is a common circulation coin, not a rare find. A pristine, uncirculated example can bring a couple of dollars from a collector, but that is the ceiling for a normal specimen.

That bearded man is Venustiano Carranza, a figure from the Mexican Revolution. This coin belongs to the era of "old pesos" (pesos antiguos), the currency Mexico used before the 1993 revaluation that lopped three zeros off the peso. In 2026, that history makes it a curiosity, not a payday.

What this coin actually is

The 1984 100 pesos is made of aluminum-bronze (aluminio-bronce), a copper alloy that gives it a golden-yellow tone. It is not gold and it is not silver, so it has no precious-metal melt value to fall back on. Mexico struck these in large quantities for everyday spending.

Here are the exact specifications so you can confirm you have the right coin:

Front (obverse): the Mexican coat of arms, an eagle on a cactus devouring a snake, with the legend "ESTADOS UNIDOS MEXICANOS" (United Mexican States).

Back (reverse): the face value "$100", the year "1984", and the "Mo" mint mark of the Mexico City Mint.

How much is the 1984 100 pesos worth?

Value on this coin is driven almost entirely by condition (grade). Because millions were made and many survive, even nice examples stay cheap.

These are collector-market figures for a normal coin. If you have a handful of them, the practical value is close to their old face value, which after the 1993 revaluation is essentially symbolic. To understand how wear affects the numbers, see the Pesoteca guide to coin grading.

The "is this the valuable one?" question

People hear that some Mexican 100 pesos coins are worth serious money and hope theirs is one of them. Two things to keep straight:

• The silver 100 pesos, the Morelos design struck 1977 through 1979, is a different coin. It contains real silver and is worth more, tied partly to metal value. The 1984 aluminum-bronze piece is not that coin.
• Real mint errors (off-center strikes, die rotation, double strikes) can multiply value if they are genuine and verifiable. But most "errors" shared online are post-mint damage: dings, corrosion, or wear, not factory mistakes. If you think you have a true error, post clear photos to the Pesoteca forum for a second opinion before you get excited.

How to tell if yours is genuine

Counterfeits of a low-value circulation coin are rare because there is no profit in faking it. Still, to confirm authenticity:

• Weigh it on a jewelry scale. It should read close to 12.12 grams.
• Measure the diameter. It should be about 26.71 mm.
• Check the edge for even reeding and the relief for sharp, well-defined detail.

Fakes typically show the wrong weight or diameter, flat relief, or uneven coloring.

Where to sell it

For a common coin like this, keep it simple:

• A verified numismatic shop from the Pesoteca directory can appraise it on the spot.
• The Pesoteca buy-and-sell forum puts you in front of collectors directly.

Photograph the front, back, and edge, and check the grade before you list it. For a piece worth a dollar or two, do not overpay for shipping or grading services that cost more than the coin.

Got a jar of these old pesos and not sure which ones are worth setting aside? Post your photos in the Pesoteca forum and let the community sort the keepers from the pocket change.

Mexican circulating peso coins from the second half of the 20th century were struck in alloys that changed according to the cost of metals and inflationary pressures: .720 silver in the $1, $5, $10, $25 denominations during the 1940s-50s; cupronickel starting in the 1970s; aluminum-bronze and stainless steel in the 1980s; pieces featuring historical figures (Hidalgo, Cuauhtemoc, Juarez, Madero, Carranza, Sor Juana) in the late 1980s, right before the transition to Nuevos Pesos in 1992. 1984 corresponds to the period when this variant was in circulation.