8 Escudos Carlos IV 1790 Gold Coin: Value & Prices

If you inherited an 8 Escudos gold coin dated 1790 with the bust of Carlos IV, you own a real gold piece with a value floor set by its metal, and often much more. This is the largest gold denomination of the Spanish colonial system, and in 2026 even a worn, genuine example is worth over 1,500 USD in gold content alone. Nicer examples sell for several thousand.

What you actually have

This is a Spanish colonial gold coin struck at the Mexico City mint (Casa de Moneda de México) in 1790, during the reign of Carlos IV. The denomination is 8 Escudos, popularly called an "onza" (ounce), the top gold coin of the colonial monetary system. The letters FM on the coin are the initials of the assayer, the official who certified the gold's fineness.

These are the verified specs. Match your coin against them with a jewelry scale and a caliper before doing anything else:

At .875 fineness on a 27.01 g coin, you hold roughly 0.76 troy ounces of pure gold. That gives the coin a hard floor at melt value, which tracks the gold spot price and sits well over 1,500 USD in 2026. No genuine 1790 8 Escudos is worth less than its gold.

What it's worth by grade

Melt is the floor, not the ceiling. Colonial gold trades at a premium over metal because collectors want it, and condition drives everything. As a general guide:

• Heavily worn, cleaned, or damaged: close to melt, roughly 1,500 to 1,900 USD depending on the gold price.
• Circulated but honest, clear portrait and legends: often 2,000 to 3,000 USD.
• Sharp, uncleaned, high grade (About Uncirculated or better): 3,500 USD and up, with premium examples going higher at auction.

Charles IV 8 Escudos from Mexico City in the 1790s are relatively available compared to rarer colonial dates, so most of the value lives in the gold plus a modest collector premium. Original surfaces matter: a cleaned or polished coin can lose a large chunk of its premium even if the gold is intact.

Errors and varieties

Genuine mint errors (off-center strikes, die rotation, doubled strikes, recognized varieties) can multiply a coin's value if they are real and verifiable. Be skeptical. Most "errors" people spot are post-mint damage: dings, scratches, corrosion, not factory mistakes. If you think you have a true error, get it looked at before assuming a windfall.

How to tell if it's genuine

Colonial gold is heavily counterfeited, so verify before you buy or sell.

1. Weigh it. It should hit 27.01 g. A fake in the wrong alloy usually misses this.
2. Measure it. 37 mm diameter, with a diagonal reeded edge.
3. Check the details. Look at the engraving style, the mint mark, and the FM assayer initials. Modern copies often botch the lettering and portrait.
4. Be suspicious of any price far below melt. Nobody sells real colonial gold under its metal value.

For a coin this valuable, professional authentication (NGC or PCGS) is worth it. A certified, graded coin sells faster and for more, because the buyer isn't guessing.

Where to sell it

Because this is a precious-metal piece, sell where the coin gets seen and weighed, not to the first Facebook offer.

• A verified numismatic shop from the Pesoteca directory will value it on the spot.
• The Pesoteca buy-and-sell forum puts you in front of collectors who understand colonial gold.

Photograph the obverse, reverse, and edge in good light before listing. Compare against the price ranges above so you know your floor. Only deal with a buyer who lets you verify weight and authenticity before money changes hands.

Wondering if your 1790 8 Escudos is a common date or something rarer? Post clear photos on the Pesoteca forum and let collectors weigh in before you sell.

Eight escudos Carlos IV, 1790, Mexico City Mint. The record describes the first type with the bust of Carlos III and the legend Carol IV, a continuation of the transitional die of the first year of the reign. First full year of the viceroyalty of the second Count of Revillagigedo, Juan Vicente de Güemes Pacheco de Padilla, son of the previous Revillagigedo and considered one of the best enlightened viceroys of New Spain. That year the Sun Stone and the Coatlicue were discovered in Mexico City's main plaza during the leveling works ordered by the viceroy himself, archaeological finds that Antonio de León y Gama reported in his Descripción histórica y cronológica de las dos piedras published the following year. The ounce weighs 27.06 grams with the 0.875 fineness typical of the Carlos IV bust. Milled production with a standardized round planchet. In Europe the French Revolution was advancing with the Civil Constitution of the Clergy. 1790 pieces retain the peculiarity of the transitional bust of Carlos III with the legend already updated, an iconographic singularity that makes them collectible as a testimony of the dynastic change.