8 Reales Felipe IV 1647 (Silver Cob): Value & How to Sell

If you inherited or found an 8 Reales dated 1647 with Felipe IV, here's the straight answer: a genuine coin usually sells from roughly 200 USD for a worn, off-center example up to several thousand USD for a well-struck, certified piece. It is real silver, real colonial history, and one of the most faked coins on the market. Value depends almost entirely on authenticity and grade.

This is a Spanish colonial "cob" (in Spanish, macuquina): a hand-struck silver coin cut from a bar and hammered, not machine-milled. That's why so many look crude, irregular, or off-center. That look is normal for the type, not a defect.

What you actually have

This is an 8 Reales struck at the Mexico City Mint (Casa de Moneda de México) in 1647, during the reign of King Felipe IV of Spain. The letter P on the coin is the assayer's mark, the mint official who certified the silver purity. For centuries the 8 reales, often called the "piece of eight," was the most widely circulated trade coin on the planet, and Mexico was its biggest producer.

Spec	Detail
Denomination	8 Reales
Metal	Silver (.900 fine)
Weight	27.37 g
Diameter	38 mm
Edge	Plain (smooth)
Mint	Mexico City
Assayer	P
Reign	Felipe IV
Catalog ref.	391

How much is a 1647 8 Reales worth?

There is no single price, because cobs vary wildly in strike quality and preservation. A rough, corroded, weakly struck coin is worth close to its silver content plus a modest collector premium. A full, well-centered strike with a clear date, mint mark, and assayer letter is where the real money is.

Condition	Approximate value (USD)
Heavily worn / corroded, date unclear	150 to 300
Average circulated, date and mint mark readable	300 to 800
Strong strike, full details, certified	1,000 to 3,000+
Exceptional / shipwreck-provenance certified	3,000 to 8,000+

Two things drive the top figures: a complete, readable strike (date, assayer, cross, and shield all visible) and third-party certification from NGC or PCGS. Silver cobs recovered from documented shipwrecks, when certified with provenance, sell at a premium because collectors trust the story and the grade.

The silver floor

At .900 fineness and 27.37 g, the coin contains roughly 0.79 troy ounces of pure silver. That sets a hard bottom: no genuine example should sell for less than its melt value, and any offer far below the metal price is a warning sign, usually of a fake or a lowball buyer.

The myth: "it's from the 1600s, so it's priceless"

Age alone does not make this coin valuable. Millions of 8 reales were struck across the colonial period, and Mexico City was the most prolific mint of them all. What separates a 300 USD coin from a 3,000 USD coin is strike quality, eye appeal, and a clean certification, not the year on it. Being old is the entry ticket, not the jackpot.

How to tell if yours is genuine

This type is heavily counterfeited, both period-era fakes and modern reproductions. Check these before you believe any price:

• Weigh it. A jeweler's scale should read close to 27.37 g. Modern fakes are often lighter, made of base metal, or oddly heavy.
• Measure it. Around 38 mm across. Cast copies are frequently off.
• Look at the surfaces. Genuine hammered silver shows crude but sharp, hand-cut detail. Cast fakes have a soft, grainy, or "bubbly" look and often a visible seam on the edge.
• Read the marks. Look for the Mexico mint mark, the assayer letter, and a plausible strike style for the period. A perfectly round, perfectly centered coin should raise suspicion, because that isn't how cobs were made.

If the weight and diameter are off, treat it as a replica until proven otherwise. For anything you think is real and valuable, get it authenticated by NGC or PCGS. That grade is what unlocks the higher prices and protects you from disputes.

Where to sell it

• A verified coin shop. Use the Pesoteca shop directory to find a dealer who will appraise it in person and pay fairly, no middleman markup.
• The collector marketplace. The Pesoteca buy-and-sell forum puts you in front of collectors who understand colonial silver.
• Certified auction. For a high-grade or shipwreck coin, a specialist auction house that handles world coins will get you the strongest result.

Before selling, photograph the obverse, reverse, and edge in good light, and compare the coin to the price ranges above. Do not dump it to the first Facebook offer, and always verify before you pay if you're the buyer. For more on the type, see our broader guide to Mexican silver coin values and colonial coinage.

Got one in a drawer and not sure if it's real? Post clear photos of both sides and the edge in the Pesoteca forum and the community will help you tell a genuine cob from a replica.

This piece belongs to the reign of Felipe IV of Spain (1621-1665). King during the Thirty Years' War and the separation of Portugal. His favorite was the Count-Duke of Olivares.

The government of New Spain in 1647 was in the hands of Marcos de Torres y Rueda, bishop of Yucatán, governing as interim viceroy after the departure of the count of Salvatierra.

The numismatic type of the piece is cob, also called hammer-struck coin. The blanks were clipped with shears from a silver bar and struck between manual dies, which is why no cob has a milled edge or a perfectly circular shape. It circulated as the benchmark trade coin throughout the Atlantic for more than two centuries.

The Mexico mint (crowned Mo mark) operated from 1535 as the first mint in the Americas. During the 17th century it struck cobs almost without interruption, being the main point of issue of struck silver in the Spanish empire. The dies were signed by the assayer of the Mexico mint active in the period, an official charged by the Royal Treasury with certifying that the silver fineness met the viceregal standard.

Colonial catalogs trace this piece within the families of the Real de a ocho of Mexico, with prices that respond to rarity by year and assayer's signature.

Year of the interim government of bishop Torres y Rueda after the departure of the count of Salvatierra.