The Libertad is the most misunderstood of the major world coin series. It is routinely filed alongside the Eagle, the Maple and the Britannia as though it works the same way. It does not — and the differences are the whole reason collectors care about it.
Three things that make it unusual
It has no face value. Look at a Libertad and you will not find a denomination anywhere on it. The coin states its weight and purity and nothing else. This is not an oversight — it is written into Mexican law. Article 2 bis of the Ley Monetaria de los Estados Unidos Mexicanos states that these coins "no tendrán valor nominal" — they shall have no nominal value — and that they are legal tender at the peso equivalent of their daily quotation, which Banco de México is obliged to honor without limit. The Krugerrand is the only other major series issued this way.
It is denominated in onzas. The Libertad is struck to the troy ounce and its fractions, not to rounded gram weights. That sounds like a technicality until you compare it to the Chinese Panda, which abandoned ounces for grams in 2016. The Libertad kept the onza, and the coins are inscribed in Spanish accordingly — 1 onza plata pura, ley .999.
Its mintages are set by demand, not by schedule. This is the important one, and it is covered in its own section below.
The mint
Casa de Moneda de México was established on 11 May 1535 and is the oldest mint in the Americas — operating for more than two centuries before the United States Mint existed. The Libertad is its flagship modern series.
One correction worth making, because it appears on a lot of dealer sites: Libertads are not struck in Mexico City. Coin production moved to San Luis Potosí in 1983. The original 1535 building on the Zócalo is now the Museo Nacional de las Culturas. The lineage is institutional, not the physical facility.
The Libertad also has a predecessor worth knowing. The Onza Troy, first issued in 1949 and revived from 1978 to 1980, was struck in .925 silver and inscribed with its weight in grains. The 1949 issue is generally credited as the first government-issued one-ounce silver coin of the modern era. When silver prices collapsed in 1980–81 the series stopped, and Banco de México redesigned it into the Libertad we know.
When each metal and size began
Gold came first, in 1981, in three sizes: 1 oz, 1/2 oz and 1/4 oz. The original run was struck in 90% gold on the old Centenario standard — a gross weight above one ounce, carrying one full ounce of pure gold. From 1991 the gold Libertad has been .999 fine, and the 1/10 oz and 1/20 oz were added that same year.
Silver followed in 1982, initially as a 1 oz coin only. Silver has been .999 fine from the very first year and has never changed. You will see sources claiming a silver fineness change in 1991 — there wasn't one. 1991 is a real watershed year, but what changed was the gold purity and the arrival of fractional sizes in both metals.
The larger silver formats arrived later. The 2 oz and 5 oz began in 1996. The kilo is a more tangled story: a proof-like kilo launched in 2002, and the regular kilo did not arrive until 2008.
This matters when you are building a set: a "complete" run of 5 oz silver Libertads starts in 1996, not 1982, and anyone offering you an earlier one is describing something that does not exist.
The designs, and when they changed
One side carries the Winged Victory of the Mexican Independence Monument — the Angel of Independence on Paseo de la Reforma — with the volcanoes Popocatépetl and Iztaccíhuatl behind her. The other carries the Mexican coat of arms, the eagle perched on a cactus devouring a serpent.
A naming warning: Banco de México and the US grading services disagree about which side is which. Banxico calls the coat of arms the obverse and the Angel the reverse. PCGS, NGC and US dealers do the opposite. Neither is wrong; they are different conventions. When precision matters, say "the Angel side" and "the coat-of-arms side" and the ambiguity disappears.
The original treatment showed the Angel from the front. Gold used that view from 1981 to 1999 and silver from 1982 to 1995; both then moved to the three-quarter profile still in use today.
From 2000, the coat-of-arms side was redrawn to surround the central emblem with a ring of historic eagle designs used as the national arms across Mexican history — including the eagle from the Codex Mendoza. It is why a modern silver Libertad looks considerably busier on that side than a 1980s one.
How the mintages actually work
Most world mints set a production schedule and strike to it. Banco de México does not. Libertad production is set against actual orders each year, and when the ordering window closes, production stops.
The consequence is a mintage table that swings wildly and unpredictably. Some years run to millions of coins — 1992 saw nearly 2.5 million 1 oz silver. Others collapse.
The clearest illustrations:
- The 1998 1 oz silver, at roughly 67,000 pieces, is the key date of the whole silver series. PCGS describes it as the lowest mintage of any one-ounce Libertad excluding proofs. For context, the 2018 issue ran 936,000 — fourteen times as many.
- 2003 in gold, where production across the individual sizes fell to somewhere between roughly 300 and 800 pieces each — numbers that belong to a commemorative issue, not an ongoing series.
- 2005 in the large silver formats, with the 5 oz at about 2,400 and the 2 oz at about 3,500.
- The kilo, which has run as low as 200 pieces in several recent years.
The 2025 issue deserves its own note. Reported mintages are exceptionally small across the board — a few hundred pieces in most silver sizes — and no gold Libertads were released for 2025 at all.
This is why the Libertad rewards research more than almost any comparable series. Two coins that look identical, ten years apart, can differ by three orders of magnitude in how many were made. There is no way to know which is which except to check.
It also means scarcity here is genuine rather than manufactured. Nobody set out to make the 2003 gold rare; demand simply did not materialize that year, and the mint moved on.
A caution on mintage figures. Banco de México publishes technical specifications but not a consolidated public mintage table, so most year-by-year Libertad numbers in circulation come from dealer references and catalogs rather than from the issuing authority. They are broadly reliable and widely cross-checked, but they are not official, and Banxico has revised figures after initial release. Treat any specific number as a strong indication rather than a certainty, and check the grading service's population report alongside it.
Where the graded populations get thin
Two areas consistently produce small population figures:
- The large formats. The 2 oz, 5 oz and kilo coins were struck in far smaller numbers than the 1 oz from the outset, and they are physically awkward to store and ship, so fewer survive untouched. Large planchets are also harder to strike and handle flawlessly, which compounds the effect.
- The proofs. Proof Libertads have always been a small fraction of total output. The 2018 1 oz is a clean illustration: 936,000 in the standard finish against 10,000 proofs, roughly ninety to one.
Silver is also unusually condition-sensitive. The fields are broad and bright, so contact marks show immediately, and the gap between MS 69 and MS 70 populations on a given year is routinely an order of magnitude. Where a scarce date meets a scarce grade the effect is multiplicative — a 1998 1 oz in MS 70 is scarce twice over.
Proofs come in more than one form, and the holder will tell you which: a standard proof has a frosted Angel against a polished field, while a reverse proof inverts it — polished Angel, frosted field. An antique finish was introduced in 2018.
Labels and designations you will see
Libertads attract more special holder treatments than most series. The ones worth understanding:
- Flag label and picture frame holders are presentation choices by the grading service, not grades. They can affect desirability; they do not affect condition.
- First Strike (PCGS) and Early Releases (NGC) mean the coin was submitted within a defined window after release — thirty days in both cases, though PCGS measures from your postmark and NGC from when the coin arrives. PCGS states plainly that the designation "concerns release timing only." Neither says anything about strike quality, and neither means the coin was among the first struck. Mints do not track that.
- MS applies to business strikes, PR (PCGS) or PF (NGC) to proofs. DCAM and Ultra Cameo describe contrast on proofs, not grade.
- Ultra Breaks and similar are presentation labels tied to how the coin was sourced, not to the coin itself.
What to check before you buy
- Look up the mintage for that exact year and size. More than in any other series, this is where the value is decided. Do not assume a recent year is common or an old year is scarce.
- Verify the certification number on the grading service's own site. It confirms the coin, the grade, and how many others share it.
- Check the population at that grade, which is a different question from the mintage.
- Confirm the size exists for that year. 2 oz and 5 oz start in 1996; the regular kilo in 2008; silver and gold fractionals in 1991.
- For gold, check the purity against the date. Pre-1991 gold Libertads are 90% gold, not .999. For silver, .999 applies to every year — if a listing claims otherwise, it is wrong.
Where to start
The 1 oz silver is the natural entry point and the easiest run to build by date, with the 1998 as the date to hunt. Collectors who want scarcity rather than completeness go to the large formats — the 2 oz and 5 oz — or to the proof issues, where the numbers are small enough to matter. The gold, particularly in the low-production years, is the specialist end of the series.
assay house holds Libertads across silver and gold, in sizes from fractional gold through 5 oz silver. Every listing is a single certified coin, photographed in its own holder, with the grading service, grade and certification number stated so the population can be checked before purchase.