Mexican 8 Reales Cap and Rays, Guadalajara 1890

If you inherited an old Mexican silver dollar-sized coin with an eagle on one side and a liberty cap over sunrays on the other, you have a Mexican 8 reales. The 1890 Guadalajara issue is worth about 25 to 30 USD just for its silver, and roughly 200 to 300 USD in collectible condition. It is real silver, not a rare treasure, but not junk either.

Here is the honest breakdown of what yours is worth in 2026, how to spot a fake, and where to sell it.

What you actually have

This is an 8 reales from the series collectors call "cap and rays" (in Spanish, resplandores). Mexico minted these silver trade coins from 1823 to 1897. It is regular circulating silver, not a commemorative.

Your specific coin: struck at the Guadalajara mint in 1890, assayer initials JS, cataloged as KM-377.6.

How to read the markings:

• Front (obverse): the Mexican eagle eating a snake, with the legend REPÚBLICA MEXICANA.
• Back (reverse): a Phrygian liberty cap with the word LIBERTAD over a burst of sunrays. That sunburst is where the "cap and rays" nickname comes from. You will also see the value 8R, the mint mark Ga (Guadalajara), the year, and the fineness.

What it's made of, and its silver value

This coin is real silver. The exact specs:

• Weight: 27.07 grams
• Fineness: 0.903 (90.3 percent silver)
• Pure silver content: about 24.4 grams, which is 0.786 troy ounces
• Diameter: about 39 mm

That 0.786 troy ounces of silver is the floor value, its worth if it were only scrap metal. To calculate it, multiply 0.786 by the current spot price of silver per ounce. At recent silver prices, that comes to roughly 25 to 30 USD in pure metal.

Note: an older database listed this as 0.900 fine, but the cataloged fineness for this family is 0.903. Close enough that it barely changes the melt math.

What it's worth as a collectible (2026)

Above the silver floor, this becomes a collector coin, and grade drives the price.

Coin	Year	Mint	Melt value (silver)	Collectible range
8 Reales cap and rays	1890	Guadalajara (Ga, JS)	~25 to 30 USD	~200 to 300 USD

Comparable Guadalajara years (1887, 1892) list around 200 to 300 USD in collectible grades. A worn example that just barely reads changes hands closer to its silver value. A sharp, high-grade piece with a strong eagle and crisp cap can pull the upper end or more.

What pushes the price up: sharp detail, no cleaning, no heavy scratches, and full readable date and mint mark.

About those weird stamps on the coin

If your coin has small Chinese-looking characters punched into it, do not panic. Those are chopmarks, and they are part of the story.

The 8 reales was the dominant trade coin of the entire world in the 1800s and circulated heavily across Asia. Chinese merchant houses stamped them with their own marks to guarantee the silver was genuine. A chopmark does not disqualify your coin. For many collectors it adds interest, since it proves the coin actually traveled and traded.

How to tell if yours is genuine

Counterfeits of Mexican silver exist, so run these checks:

1. Weight: should be right around 27 grams. A cheap scale will tell you fast if it is way off.
2. Diameter: about 39 mm.
3. Edge: the rim should be reeded (fine vertical grooves), not smooth.
4. Detail: look at the eagle's feathers and the liberty cap. Fakes often have mushy, soft detail.
5. Ring: real silver has a clear, ringing tone when tapped gently.

If anything looks off, get it checked by a specialist before you buy or sell. You can find dealers in the Pesoteca shop directory.

Where to sell it

The Pesoteca shop directory lists numismatic dealers who buy and sell Republic-era 8 reales silver. Before you close any deal:

• Check the coin's silver value at that day's spot price so you know the floor.
• Compare against listings for the same year and mint (Guadalajara, 1890 or nearby years).
• Don't accept an offer that only pays melt value if the coin has collectible grade.

Want to see how this fits the wider series? Browse other pieces in 8 reales silver, Mexican Republic.

Got one with an unusual chopmark or an off date? Post a clear photo of both sides on the Pesoteca forum and we'll help you pin down what you have.

In 1890 Porfirio Diaz governed during the mid-Porfiriato. These were the years of the 1889 Paris Universal Exposition with a Mexican pavilion, and of the consolidation of the railroad as a backbone of the economy.

The Guadalajara mint (Ga) opened at Independence under insurgent and later royalist control. It closed in 1895 during the Porfirian concentration of minting.

Ga pieces have demand in Jalisco and western Mexico. Irregular mintages. Years with an assayer change are particularly hunted.

As a catalog reference, this mint's variant is listed as KM#377.6 in Krause. The piece is .9028 fineness silver with a reeded edge and a theoretical weight of 27.07 grams. The 1890 Guadalajara, Jalisco example corresponds to the mature stage of the mint, near its closure (1812-1895), and is identified on the coin by the Ga mint mark.

The collector building the series by mint tends to hunt Ga examples from the 1890s cycle in lots or peer-to-peer trades, avoiding middleman resale. It's worth confirming the piece has a weight close to 27 grams (minting tolerance) and a diameter of 39 millimeters. Pieces resurfacing from local hoards appear periodically on the market and are the best window to obtain a high grade without a premium.