8 Reales Fernando VI 1748 (Mexico City): Value Guide

If you inherited or found a large silver coin dated 1748 with a Spanish king's name on it, you likely have a Mexico City 8 Reales of Fernando VI. In worn condition it trades for roughly 60 to 200 dollars. Genuine high-grade examples reach the low thousands. It contains real silver, so it has a hard floor at melt value even at its worst.

This is one of the most historically important coins ever struck. The 8 Reales, the original Spanish "piece of eight," was the dominant global trade coin for centuries, and the Mexico City mint produced more of them than anywhere else on earth. That fame is exactly why fakes are everywhere, so verifying yours matters more than with almost any other coin.

What you actually have

• Denomination: 8 Reales (eight reales), the flagship silver dollar of the Spanish Empire.
• Ruler: Fernando VI (Ferdinand VI of Spain), whose portrait or arms appear on the coin.
• Date: 1748.
• Mint: Mexico City (the "M" with a small "o" mintmark).
• Assayer initials: MF, the mint official who certified the silver purity.
• Metal: Silver, .900 fine (90 percent pure).
• Weight: 26.56 grams.
• Diameter: 40 mm.
• Edge: Laureate (decorative, milled edge).
• Catalog reference: KM#104.1.

The 1748 date places this among the earlier "pillar" and portrait-style colonial issues from the transition of Spanish coinage design. These early Fernando VI dollars are scarcer than the later, more common issues of Carlos III and Carlos IV, which is part of why a solid example is worth more than most people expect.

What it's worth in 2026

Value on this coin comes down to three things: authenticity, grade (state of preservation), and the fact that it is genuine silver. Do not assume "old" means "fortune." Most colonial 8 Reales that turn up in family collections are heavily circulated, and those trade closer to their silver content than to any collector premium.

Condition	Approximate value (USD)
Heavily worn / damaged	40 to 80 (near melt value)
Circulated, clear details	80 to 200
Lightly circulated, sharp	250 to 700
Uncirculated / choice, certified	1,000 to 3,000+

Melt value alone (the silver in it) runs roughly 15 to 20 dollars depending on the daily silver price. That is your absolute floor for a genuine piece, and it is why any offer far below the metal value should make you walk away.

Grade is decisive. A certified uncirculated example can sell for ten to twenty times what the same coin brings in worn, cleaned condition. Cleaning is the single most common way people destroy value here, so if the coin looks dark or toned, leave it alone.

The myth to ignore

Social media is full of claims that colonial silver coins are "worth millions." For a standard 1748 Mexico City 8 Reales, that is not true. Genuine record prices for exceptional colonial 8 Reales in top certified grades reach the thousands, occasionally higher for extreme rarities and shipwreck-provenance pieces, but a typical circulated example is a two-figure to low three-figure coin. Anyone quoting you a life-changing number for an ordinary specimen is selling a fantasy.

How to tell if yours is genuine

This coin is faked constantly, both as period counterfeits and modern reproductions. Run these checks before you get excited or pay for anything:

1. Weigh it. A genuine piece is 26.56 grams. Use a jewelry scale. Cast fakes are often light or oddly heavy.
2. Measure it. Diameter should be about 40 mm. Use calipers if you have them.
3. Check the edge. It should show a laureate (patterned) edge, not a smooth or plain one.
4. Silver test the sound and look. Real .900 silver has a distinct ring and a soft gray tone. Bright, chrome-like surfaces are a red flag.
5. Study the engraving. Compare the assayer mark (MF), mintmark, and lettering style against verified reference images. Fakes often get the details slightly wrong.

If the weight, diameter, or edge is off, it is almost certainly a reproduction. When in doubt, get it authenticated by a professional grading service before selling.

Where to sell it

Because this is a precious-metal coin that is widely faked, sell where the buyer inspects and weighs the piece in front of you:

• A verified numismatic dealer from the Pesoteca shop directory will value it on the spot.
• The Pesoteca buy-and-sell forum connects you with collectors directly.
• For a high-grade example, consider NGC or PCGS certification first. A graded coin sells faster and for more, and it removes any authenticity doubt.

Photograph the front, back, and edge in good light before you list it. Check the value range in the table above so you know what a fair offer looks like, and never dump it to the first buyer on a social feed.

Got an 1748 Fernando VI 8 Reales and not sure if the details match? Post clear photos of both sides and the edge in the Pesoteca forum and let the community help you confirm what you have.

This piece belongs to the reign of Fernando VI of Spain (1746-1759). Son of Felipe V. His reign was marked by neutrality in the European conflicts and by Enlightenment reforms in Spain and the Indies.

The government of New Spain in 1748 was in the hands of Juan Francisco de Guemes y Horcasitas, count of Revillagigedo, the first viceregal term of the Guemes family.

The numismatic type of the piece is pillar (columnario), officially introduced in New Spain in 1732. The reverse shows two crowned globes between the Pillars of Hercules with the motto PLVS VLTRA, and for the first time the coin was struck on a screw press with a laureate edge, which reduced the fraudulent clipping of silver and made the pillar dollar the most trusted trade coin of its era.

The Mexico City Mint formally introduced the mechanized striking of pillar dollars in 1732, and from then on the crowned Mo mint mark was accompanied by the assayer's initials. Production was enormous, exported as trade money to the Philippines, China, Protestant Europe, and the 13 English colonies. The dies were signed by the Mexico City Mint assayer active in the period, an official charged by the Royal Treasury with certifying that the silver fineness met the viceregal standard.

The colonial catalogs trace this piece within the families of the Mexican Real de a ocho, with prices that respond to rarity by year and assayer signature.

A year that saw the signing of the Peace of Aix-la-Chapelle, which ended the War of the Austrian Succession, with New Spain relatively on the sidelines.