8 Reales Felipe IV 1632 (Cob): Value & How to Sell

If you inherited a rough, irregular silver coin dated 1632 with a Spanish king's name on it, you have a genuine piece of colonial history, not junk. A 1632 Felipe IV 8 reales silver cob from the Mexico City mint typically sells from a few hundred dollars for a worn example to several thousand USD for a well-struck coin with a clear date. Here is what it is, what drives the price, and how to check yours in 2026.

What you actually have

This is an 8 reales cob (in Spanish, a macuquina), the famous "piece of eight" from Spanish colonial America. It was struck by hand at the Casa de Moneda in Mexico City during the reign of Felipe IV (Philip IV of Spain, who ruled from 1621 to 1665).

The hard specs, which matter for authentication:

• Metal: silver, .900 fine
• Weight: 27.48 grams
• Diameter: 45 mm
• Edge: plain (unmilled)
• Assayer: initial D
• Date: 1632

Cobs were made by cutting a chunk of silver, trimming it to the correct weight by hand, then striking it with a hammer and die. That is why every one is a different irregular shape. They look crude, but they held the legal weight and fineness, which is exactly why the piece of eight became the reference trade coin of the 17th century, circulating from Europe to Asia to the early American colonies.

What it is worth in USD

Value on a cob is not about age. Every one of these is nearly 400 years old, and age alone does not make a coin rare. What actually drives the price:

1. A legible date. Because the silver blank was often smaller than the die, a big part of the design fell off the edge. A cob where you can clearly read "1632" is worth far more than one where the date is off the flan.
2. Amount of the design present. A full shield and cross with the mint mark and assayer letter visible commands a premium.
3. Grade and surfaces. Sea-salvage cobs (recovered from shipwrecks) often show corrosion and sell cheaper than land-found pieces with original silver surfaces.

Condition	Typical value (USD)
Worn, weak or off-flan date, corroded	150 to 400
Clear date, most of the design present	500 to 1,500
Strong strike, full date and details, choice	2,000 to 5,000+

These are market ranges for Mexico City Felipe IV 8 reales cobs generally. A specific coin can land anywhere in or above this depending on eye appeal and certification. Certified examples from NGC or PCGS consistently sell at the higher end because buyers trust the grade and know the coin is genuine.

The myth to kill

A lot of people find a coin like this and assume "400 years old, must be worth a fortune." Not usually. Millions of pieces of eight were struck across the Spanish colonies, and cobs are one of the most commonly encountered colonial types. The genuinely valuable ones are the pieces with a bold, complete strike and a clean, readable date. A dark, corroded, half-legible lump is still a real historical artifact, but it is a couple hundred dollars, not a jackpot.

Also be careful: cobs are heavily faked. Cast copies and modern replicas flood online marketplaces because the irregular shape makes fakes easy to pass off to beginners.

How to tell if yours is genuine

• Weigh it. A real one is 27.48 grams. If yours is well off that number, be suspicious. Silver is dense, and cast fakes are often light.
• Check the surface texture. Genuine hammer-struck cobs show sharp, crisp lettering and design where the die hit. Cast fakes look soft, grainy, or have a seam on the edge.
• The ping test. Balance the coin on a fingertip and tap it gently. Real .900 silver rings with a clear, high, sustained tone. A fake often sounds dull and short.
• Get it certified. For anything you think is worth more than a few hundred dollars, submitting it to NGC or PCGS is the definitive answer. They authenticate, grade, and seal the coin, which also raises what a buyer will pay.

Where to sell it

Because this is a precious-metal coin with a real collector market, you have solid options:

• A verified numismatic dealer will appraise it in person and can buy it or broker it. For a high-value cob, having a professional confirm it is worth it. See the Pesoteca dealer directory to find one by city.
• The Pesoteca buy-and-sell forum, where you deal directly with collectors who know exactly what a Felipe IV cob is worth.
• Major auction houses (Heritage, Stack's Bowers) are the right venue if your coin is high grade and certified. Colonial cobs are a well-established auction category.

Before you sell, photograph the obverse, reverse, and edge in good light, and check the range in this guide so you do not accept a lowball offer. Do not dump it to the first bidder on social media.

If you want a second opinion on whether your 1632 has a strong enough date to be worth grading, post clear photos on the Pesoteca forum and let collectors weigh in before you spend money on certification.

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 1632 was in the hands of Rodrigo Pacheco, Marqués de Cerralvo, still dealing with the aftermath of the Great Flood of 1629.

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

The Mexican Mint (crowned Mo mark) operated from 1535 as the first mint in America. During the seventeenth century it struck cobs almost without interruption, being the main point of issue of struck silver in the Spanish empire. The assayer's initials declared on the piece are D, an official of the Royal Treasury charged with certifying the silver fineness (0.930 and later 0.903) according to the viceregal standard.

Colonial catalogs trace this piece within the families of the Mexican piece of eight, with prices that respond to rarity by year and assayer's signature.

A year when Mexico City was still working on draining the Valley after the Great Flood.