8 Reales Carlos II, 1698 (Mexico): What It's Worth

If you inherited a lumpy, irregular silver coin from Mexico dated 1698, you likely have an 8 reales cob of Carlos II. Most examples sell for USD 150 to 600 depending on how much detail and date show. Clean, well-struck pieces with a legible date and assayer can bring several thousand dollars at auction. In 2026, these late Habsburg cobs remain steady collector pieces.

What you actually have

This is a macuquina, the Spanish term for a hand-struck (hammered) silver coin, known to English collectors as a cob. It was made at the Mexico City mint, the oldest mint in the Americas. Because these were struck by hand on cut planchets rather than pressed by machine, every coin has an irregular, off-round shape. That is normal and does not mean your coin is damaged or fake.

The denomination, 8 reales, was the famous Spanish dollar or "piece of eight," the reference trade coin of world commerce for centuries. Carlos II was the last Habsburg king of Spain and reigned until 1700, so an 8 reales dated 1698 comes from the very end of that dynasty.

Specifications (verify yours against these)

Feature	Value
Denomination	8 reales
Year	1698
Mint	Mexico City
Ruler	Carlos II (Habsburg)
Weight	27.32 grams
Silver fineness	.900 (90% silver)
Diameter	42 millimeters
Type	Cob (hand-struck)

At .900 fineness and 27.32 grams, the coin contains roughly 0.79 troy ounces of pure silver. That gives it a melt-value floor: even a worn, low-grade example is worth at least the metal it contains, which at recent silver prices is around USD 20 to 25. No genuine 1698 8 reales is worth only its melt value, though, because it also has collector demand as an antique coin over 300 years old.

What drives the price

Four things separate a USD 150 coin from a USD 3,000 coin:

1. Full, legible date. Many cobs were struck weakly or clipped, so the date is missing or partial. A clear "1698" adds real money.
2. Visible assayer mark. Each coin was checked by an official assayer whose initial appears on the piece. An identifiable assayer helps attribution and value.
3. Strike and detail. Cobs with a strong central cross, shield, and pillars command a premium over blobby, weak strikes.
4. Grade and surfaces. Corrosion, sea-salvage porosity (many cobs came from shipwrecks), and heavy wear all pull the price down. Original silver surfaces pull it up.

Value ranges by condition

Condition	Typical range (USD)
Low grade, partial date, corroded	100 to 250
Circulated, date and assayer visible	250 to 800
Strong strike, choice detail	1,000 to 3,000+

These are working ranges for a 1698 Mexico 8 reales cob. Exact hammer prices swing with strike quality and certification. A coin certified by NGC or PCGS, especially one attributed to a documented shipwreck, sells at the top of these ranges or above.

The myth to kill

Because the coin is over 300 years old and irregular, people assume it must be worth a fortune. Age alone does not make a coin valuable. Millions of 8 reales were struck across the colonial period, and cobs are among the more available Spanish colonial types. What is genuinely scarce is a Carlos II cob with a clear date and clean surfaces, which is why grade matters more than age here.

How to tell if yours is genuine

Colonial cobs are heavily faked, so check before you get excited or before you pay anyone:

• Weigh it. Use a jeweler's scale. A genuine full-weight 8 reales sits close to 27.32 grams. A coin that weighs far less may be clipped (common and acceptable) or may be a lightweight fake.
• Measure the diameter with a caliper against the 42 mm figure. Cobs vary in shape, so this is a guide, not an exact test.
• Look at the silver. Real .900 silver tones naturally. Bright, chrome-like surfaces or a seam around the edge point to a cast copy.
• Study the engraving style, mint mark, and assayer. Modern forgeries often get the lettering and cross details wrong. Compare against reference images from a trusted numismatic source.
• Be suspicious of any deal far below silver value. If someone offers to sell you a "real" cob for less than the metal is worth, walk away.

When in doubt, submit clear photos of the obverse, reverse, and edge to the Pesoteca community forum for a second opinion, or send the coin to NGC or PCGS for professional authentication.

Where to sell it

To get a fair price and avoid getting lowballed:

• Take it to a verified coin shop from the Pesoteca shop directory, which can appraise and buy on the spot.
• List it in the Pesoteca buy-and-sell forum, where collectors who know Spanish colonial silver actually compete for the coin.
• Photograph the obverse, reverse, and edge in good light before you contact any buyer, and check the value ranges above so you know what you are holding.
• For a valuable piece, consider certifying it first. A graded, encapsulated cob sells faster and higher than a raw one.

Avoid dumping it on a general marketplace to the first bidder. Colonial silver is a specialist area, and the right buyer pays more than a bargain hunter.

Have a Carlos II cob with a date you can read? Post your photos in the Pesoteca forum and let collectors weigh in on grade and value before you sell.

This piece belongs to the reign of Carlos II of Spain (1665-1700), the last Habsburg king in Spain. His death without an heir triggered the War of the Spanish Succession (1701-1714).

The government of New Spain in 1698 was in the hands of José Sarmiento de Valladares, Count of Moctezuma, in the midst of the European dynastic crisis that foreshadowed the Spanish succession.

The numismatic type of the piece is a cob (macuquina), also called a hammer-cut coin. The planchets were clipped with shears from a silver bar and struck between hand-held dies, so no cob has a proper edge or a perfectly circular shape. It circulated as the benchmark trade coin throughout the Atlantic for more than two centuries.

The Mexico City mint (crowned Mo mark) operated from 1535 as the first mint in the Americas. Throughout the 17th century it struck cobs almost without interruption, serving as the main issuing point of struck silver in the Spanish empire. 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.

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

A year in which Europe was preparing for the succession of Carlos II, the last Spanish Habsburg, with the Partition Treaty under negotiation.