8 Reales Felipe IV 1639 (Mexico Mint): Value & Prices

If you inherited or found a heavy silver coin marked "PHILIPPVS IIII" and dated 1639, you have a Spanish colonial 8 Reales struck at the Mexico City Mint. Most examples in circulated, worn condition trade for 200 to 600 USD. Clean, well-struck pieces with a clear date and full shield can bring 1,000 to 2,000 USD or more. In 2026, demand for early Mexico-mint silver stays strong among collectors of colonial coinage.

This is the coin the English-speaking world later nicknamed the "piece of eight." For roughly three centuries it was the most widely circulated trade coin on the planet, and the Mexico City Mint (Casa de Moneda de México) was its single largest producer. That history is why these coins survive at all, and why yours is likely genuine silver rather than a modern novelty.

What you actually have

• Denomination: 8 Reales (eight reales), the largest standard silver coin of the Spanish colonial system.
• Ruler: Felipe IV of Spain (reigned 1621 to 1665). The obverse legend reads "PHILIPPVS IIII."
• Date: 1639.
• Mint: Mexico City (the "oM" mintmark stands for the Mexico mint).
• Assayer: the letter P, the mint official who certified the silver purity. Assayer initials matter to collectors and affect value.
• Metal: silver, .900 fine.
• Weight: 26.84 grams.
• Diameter: 45 mm.
• Edge: plain (no lettering or reeding).
• Catalog reference: 355.

One detail on your coin worth noting: on the obverse legend the first "I" in "IIII" was effaced, and part of another punch (a "+") appears in the reverse legend. Minor legend quirks like this are common on hand-struck colonial silver and are not damage. Whether they add value depends on how clean and unusual they are, which is a question for a specialist.

What drives the price

Age alone does not make this coin valuable. A 1639 date sounds impressive, but millions of 8 Reales were struck across the colonial period. What actually moves the number is condition, strike quality, and eye appeal.

Colonial 8 Reales from this era were struck by hand on irregular planchets, so most survivors are off-center, weakly struck, or clipped. That is normal. The coins that command real money are the ones where you can read the full date, the shield is complete, and the surfaces are clean.

Condition	What you see	Rough value (USD)
Heavily worn / clipped	Faint design, partial date	150 to 350
Circulated, readable date	Clear date, worn but complete	400 to 700
Strong strike, clean surfaces	Full shield, sharp detail	900 to 2,000+
Certified high grade (NGC/PCGS)	Encapsulated, top preservation	2,000 and up

These are guide ranges for the type and era, not a fixed price for your exact piece. A professional grade and clear photographs are what turn a range into a number.

The bullion floor

Because this is .900 silver at 26.84 grams, your coin has a minimum value tied to its metal content: roughly 0.777 troy ounces of pure silver. That sets a hard floor. No matter how worn the coin is, it is worth at least its melt value. In practice, any genuine 1639 8 Reales is worth well above melt to a collector, so never sell one for scrap.

The myth to ignore

Online listings love to slap "rare" and "worth thousands" on any colonial coin with a 1600s date. Most 8 Reales of Felipe IV are not rare in absolute terms. They are collectible and valuable, but a common, worn example is a few hundred dollars, not a fortune. The genuinely high prices go to exceptional strikes, scarce assayer and date combinations, and certified top grades. Assume yours is in the common tier until a grade proves otherwise.

How to tell if yours is genuine

Colonial silver is one of the most heavily faked series on the market, so verify before you celebrate or buy.

1. Weigh it. Use a jewelry scale. A genuine coin should sit close to 26.84 grams. Cast fakes are often light or wildly off.
2. Measure it. The diameter should be near 45 mm.
3. Check the edge. It should be plain, with no reeding or lettering.
4. Study the strike. Genuine hand-struck coins show irregular but sharp detail. Cast copies look soft, grainy, or have a seam.
5. Be suspicious of bargains. Any offer far below the silver value is almost always a fake or a trap.

If you want certainty, submit it to a third-party grading service like NGC or PCGS, which authenticate and encapsulate the coin. A certified genuine example is far easier to sell and usually brings more.

Where to sell it

• A verified dealer from the Pesoteca shop directory can appraise it in person and quote you on the spot.
• The Pesoteca buy-and-sell forum puts you in front of collectors who pay realistic prices.
• Before selling, photograph the obverse, reverse, and edge, and compare your figures against the table above.

Avoid dumping a colonial silver coin to the first offer on social media. Because these carry real precious-metal and collector value, only deal with buyers who let you verify the piece and its weight first.

Got a 1639 8 Reales, or something close to it, and not sure which tier it falls in? Post clear photos of both sides on the Pesoteca forum and let the community help you pin down the grade.

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 1639 was in the hands of Diego Lopez Pacheco, Marquis of Villena, the first viceroy of the House of Braganza in New Spain.

The numismatic type of the piece is cob, also called hammer-cut coin. The planchets were cut with shears from a silver bar and struck between hand dies, so no cob has an edge or a perfectly circular shape. It circulated as a reference 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 continuously, being the main issuing point for struck silver in the Spanish empire. The dies were signed by the Mexico Mint assayer 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 Mexican Real de a ocho, with prices that respond to rarity by year and assayer's signature.

Year of the change of viceroyalty to the Duke of Escalona, the first viceroy of the House of Braganza in New Spain.