1/20 oz Gold Libertad 1999

If you inherited or found a tiny gold coin marked "1/20 onza" with an angel on the back, here is the fast answer: it is a real gold bullion coin, and in 2026 it is worth at least its melt value in gold, plus a collector premium that depends on condition. This is not a coin worth thousands, but it is genuine gold, so it has a hard floor and is easy to sell.

What you actually have

The 1/20 onza Libertad is Mexico's smallest gold bullion coin, struck by the Casa de Moneda de México (the Mexican Mint). "Libertad" is the name of Mexico's official bullion series, sold for its precious-metal content the same way US Gold and Silver Eagles are. The reverse (back) shows the Winged Victory statue known as the Ángel de la Independencia, with the Popocatépetl and Iztaccíhuatl volcanoes behind her. "1/20 onza" means one-twentieth of a troy ounce.

Technical specs (keep these exact, they matter for verification)

Spec	Value
Denomination	1/20 troy ounce gold
Gold fineness	.999 (99.9% pure gold)
Weight	1.5552 g
Diameter	13 mm
Edge	Reeded
Year	1999
Design	Ángel de la Independencia, pre-Nueva Serie die

The 1999 issue carries the older die design. The redesign was published in Mexico's official gazette (Diario Oficial de la Federación) on May 20, 1999, but the new-die gold pieces did not reach the market until 2000 according to Banxico's technical sheet. So a 1999 coin still shows the previous design.

How much is it worth in 2026?

Because this coin holds 1.5552 g of pure gold, its value starts at melt. To get the melt figure, take the current gold spot price per troy ounce and divide by 20. That number moves with the gold market every day, so check a live gold price before you buy or sell.

On top of melt, small fractional gold coins carry a premium because they cost more to produce per gram than a full-ounce coin. For a 1/20 oz Libertad, expect a premium over melt in the ballpark of 20% to 50% depending on the dealer, the year, and condition. A pristine, uncirculated example or a certified coin (graded by NGC or PCGS) sits at the higher end.

The key honest point: this is a bullion coin, not a rarity. Do not expect a life-changing number from a single 1/20 oz piece. Its worth is real but modest, driven almost entirely by its gold content plus a small-coin premium.

Mintage: why we do not quote an exact figure

Banxico does not publish the official mintage for this specific piece in its CM10 report, whose available historical series begins in the year 2000. We will not invent a number. If someone quotes you an exact mintage for the 1999 1/20 oz gold Libertad, treat it with caution unless they cite a verifiable source.

How to tell if yours is genuine

With a gold coin, verification is straightforward because fakes almost always miss the physical specs:

• Weigh it. Use a jewelry scale. It should read 1.5552 g. Real gold is dense; a lightweight coin is a red flag.
• Measure it. Diameter should be 13 mm with a caliper.
• Check the strike. Genuine coins have crisp relief. Flat, mushy detail or uneven color suggests a counterfeit or a plated piece.
• Be suspicious of bargains. Any offer well below the gold melt value is a warning sign, not a deal.

If you want certainty, a graded slab from NGC or PCGS confirms both authenticity and condition, and it makes the coin easier to sell.

Where to sell it (and where not to)

Because this is a precious-metal coin, sell where the buyer will show the piece, weigh it, and value it on the spot. The safest routes:

• A verified coin shop from the Pesoteca shop directory, which can appraise it immediately.
• The Pesoteca buy-and-sell forum, where collectors deal directly.

Photograph the obverse, reverse, and edge before you sell, and know the current gold melt value so you can recognize a fair offer. Avoid dumping it to the first bidder on social media.

Does it have valuable minting errors?

Genuine mint errors (off-center strikes, die rotation, doubled strikes) can multiply a coin's value if they are real and verifiable. Most "errors" circulating online are post-mint damage: scratches, dings, or corrosion, not factory errors. If you think you have a genuine error, post clear photos to the Pesoteca forum so the community can review it.

Have a 1/20 oz gold Libertad, or the whole fractional set, and want a read on condition and a fair price? Post your photos on the Pesoteca forum and let collectors weigh in before you sell.

This piece is a 1/20 ounce gold Libertad struck in 1999 in regular finish (bullion satin). The series was born by decree in the DOF of April 8, 1981 and added the 1/2, 1/4, 1/10 and 1/20 fractions from 1991.

Ernesto Zedillo. On May 20 the decree updating the modern die of the Libertad ounce, in force ever since, was published in the Diario Oficial. Average gold spot 279 dollars per ounce, the cycle's low.

Fraction: pure gold 1.555 grams, .999 fineness, total weight 1.73 grams, 20 millimeters in diameter. The 1/20 is the smallest fraction and the gateway to physical gold. It began to be struck in 1991. Premium over spot 15 to 25 percent, the highest in the family.

Regular (bullion satin): matte-shine fields and satin relief, a single press strike. Wholesale distribution for physical gold investment, the year's largest mintage and the natural premium reference against spot.

Banxico CM10 does not publish mintages prior to 2000; the data is consulted in Krause (KM#630 to KM#674 depending on year and fraction).

The regular is bought for its gold content at a low premium over spot. Verify weight, diameter and reeded edge; compare the premium against Banxico Direct before accepting a middleman.