8 Reales Resplandor, Hermosillo 1888: Value & Silver Content

If you inherited an old Mexican silver coin marked "8 REALES" with a sunburst and a Phrygian cap, you have a real silver piece with a hard floor value. The 8 Reales Resplandor from the Hermosillo mint, dated 1888, is worth at least its silver melt (roughly 20 to 25 USD in 2026 depending on the spot price), and a clean, higher-grade example brings a modest premium above that. It is a genuine silver coin, not a rarity that makes headlines.

What you actually have

The "Resplandor" (Spanish for the radiant sunburst on the front) is the classic Mexican republican 8 Reales, the direct descendant of the Spanish colonial "pieces of eight." This one was struck at the Hermosillo mint (in the state of Sonora) in 1888, during the Porfiriato era.

Here are the exact specifications, which you should verify against your own coin:

Spec	Value
Denomination	8 Reales
Year	1888
Mint	Hermosillo (Sonora)
Weight	27.07 grams
Diameter	39 mm
Composition	Silver .900 (fineness 0.9028)
Pure silver content	approximately 24.4 grams
Edge	Reeded

Front (obverse): A Phrygian liberty cap over radiating sunrays (the "resplandor") with the word LIBERTAD.

Back (reverse): The Mexican eagle facing front, devouring a serpent atop a nopal cactus, with the legend REPÚBLICA MEXICANA.

How much is it worth in USD

Start with the metal. The coin holds about 24.4 grams of pure silver, roughly 0.78 troy ounces. That gives it a floor value that moves with the silver spot price, generally in the 20 to 25 USD range in 2026. No genuine, non-damaged example should sell below that.

Above melt, value depends on how well preserved the coin is. Circulated, worn examples trade close to silver value. Sharp, well-struck coins with clear detail and original luster bring a collector premium. Because the .900 silver 8 Reales was minted in large quantities across many mints, most dates in circulated grades are common. Value by grade generally breaks down like this:

Condition	Approximate value (USD)
Heavily worn / damaged	Silver melt, about 20 to 25
Circulated, clear detail	30 to 60
Lightly worn, strong detail	60 to 150
Uncirculated / choice example	150 and up, depends on the market

These are ranges, not guarantees. Hermosillo-mint 8 Reales are scarcer than the huge Mexico City and Zacatecas outputs, and a genuine high-grade Hermosillo piece can outperform the ranges above at auction. Grade drives everything here. Read our coin grading guide before you assign your coin a grade.

The "it must be worth thousands" myth

Being over 130 years old does not make this coin rare. Mexico struck millions of 8 Reales for international trade, and plenty survive. If a seller tells you a common circulated 1888 8 Reales is worth thousands of dollars, that figure is fiction. The realistic value for most examples is metal plus a small premium. The exceptions are genuinely high-grade coins and verified minting errors, both of which need expert confirmation.

This piece is part of the broader 8 Reales silver republican series, which is a good place to compare your coin against other years and mints.

How to tell if yours is genuine

Counterfeits of Mexican silver 8 Reales are common, so verify before you buy or sell:

• Weigh it. A jeweler's scale should read close to 27.07 grams. A significantly light coin is a warning sign.
• Measure it. The diameter should be about 39 mm with a reeded (grooved) edge.
• Check the mint mark and assayer initials. These identify the coin as Hermosillo, 1888. Wrong or missing marks point to a fake.
• Study the engraving style. Cast fakes look soft, blurry, or have seams on the edge.
• Be suspicious of any offer far below silver value. No honest seller prices a genuine silver coin under melt.

For a coin worth confirming, submit it to a third-party grading service (NGC or PCGS), which authenticates and grades it in a sealed holder.

Where to sell it

To sell an 8 Reales Resplandor, your safest options are a verified numismatic dealer from the Pesoteca directory, who can appraise it on the spot, or the Pesoteca buy-and-sell forum where collectors trade directly. Photograph the front, back, and edge before you sell, and check the value-by-grade ranges above so you know your floor. Avoid dumping it to the first bidder on social media, and never sell a silver coin below its melt value.

Got one in a drawer? Post clear photos of both sides in the Pesoteca forum and let the community help you pin down the grade and value.

In 1888 Porfirio Díaz governed in his second consecutive term. Years of railway expansion (Mexico City-Ciudad Juárez, Mexico City-Laredo) and of consolidation of foreign capital in mining and industry.

The Hermosillo mint (Ho) was established in 1835 to handle the silver of Sonora without depending on Álamos. It closed in 1895 with the centralizing reform of the Porfiriato.

The Ho pieces have low mintages compared to Mexico City or Zacatecas. Late years (1893-1895) are harder to find in good grade.

For catalog reference, this mint's variant is listed as KM#377.9 in Krause. The piece is .9028 fineness silver with a reeded edge and a theoretical weight of 27.07 grams. The 1888 Hermosillo, Sonora example corresponds to the mature phase of the mint, near its closure (1835-1895) and is identified on the coin by the Ho mint mark.

In the Mexican numismatic market the Ho-1888 cap-and-rays peso appears regularly at auction and at the downtown open-air markets. When hunting it down, it is worth verifying a clean reeded edge, without clipping, and that the Ho mint mark is sharp. Before paying a middleman's markup, consult the reference range by grade in public catalogs and on the Pesoteca forum; many examples from this decade (1880s) can be had at par price without the need for speculative intermediaries.