5 oz Silver Libertad 2004 Proof: Value & How Rare It Is

If you inherited or found a large silver Mexican coin marked "5 ONZAS PLATA PURA .999," you have a Libertad, and the 2004 Proof is one of the scarce ones. Its metal alone is worth roughly 145 to 165 USD at current silver prices, but with only 600 minted, this Proof trades well above melt value on the collector market.

What this coin actually is

The Onza Libertad is Mexico's pure silver bullion series, struck by the Casa de Moneda de México (the Mexican Mint) since 1982. The 5 ounce size is the large member of the family. Each one carries 155.5 grams of .999 fine silver (exactly 5 troy ounces), measures 65 mm across, and has a reeded edge.

The front (obverse) shows the Mexican coat of arms surrounded by the historic coats of arms of Mexico. The back (reverse) shows the Winged Victory, the golden angel that tops the Ángel de la Independencia monument in Mexico City, with the volcanoes Popocatépetl and Iztaccíhuatl behind her. That design has run across the whole Libertad series since 1996.

Why the 2004 Proof matters

The design is not what makes this coin valuable. The mintage is. The 2004 Proof was struck in just 600 pieces. That is an extremely low number, even for a collector coin, and it separates this piece completely from the one ounce Libertads that come by the thousands.

A quick word on "Proof" for anyone new to this: Proof coins are struck with polished dies in very short runs, giving a mirror background with a frosted, matte relief. The contrast makes every detail pop. The regular bullion version (called BU, or brilliant uncirculated) has a normal finish, a larger mintage, and sells for less than the Proof.

What it's worth in 2026

Start with the floor. Five troy ounces of silver set the melt value, so multiply 5 by the current spot price of silver per ounce. At recent prices that puts the pure metal around 145 to 165 USD.

That is the bottom, not the ceiling. Because this is a Proof with a 600 coin mintage, the collector price sits clearly above the silver value. Generic 5 ounce bullion Libertads already start near 460 USD, and a scarce Proof like the 2004 carries a premium on top of that. Condition and whether it comes with its original mint capsule and certificate move the number further.

Item	Detail
Coin	5 oz Silver Libertad, Proof
Year	2004
Metal	.999 fine silver, 155.5 g (5 troy oz)
Diameter	65 mm
Mintage	600 pieces
Melt value	About 145 to 165 USD (moves with silver spot)
Collector value	Well above melt; Proof premium applies

Prices for a low mintage Proof depend heavily on grade and originality. A raw coin with fingerprints or milk spots sells for far less than a clean, capsule-fresh example graded by a service like NGC or PCGS. If yours is in an original mint box with paperwork, keep it that way.

The myth to avoid

A large, heavy silver coin makes people assume "fortune." With most silver bullion, the honest answer is that the metal is the value, and age adds little. This 2004 Proof is one of the exceptions, and the reason is the 600 piece mintage, not the size or the shine. Do not let a seller charge a huge premium on an ordinary bullion 5 oz by implying it is the scarce Proof, and check the year and finish before you pay.

How to tell if yours is genuine

• Weight and size. It must weigh 155.5 grams and measure 65 mm. Silver hits a very precise weight, and fakes almost always come up short.
• Mint mark. Look for the "Mo" mint mark of the Mexican Mint.
• Edge. The edge is reeded, not smooth.
• Proof surface. A real Proof shows a clean mirror background with frosted devices. A dull, flat field is a warning sign.
• Magnet test. Silver is not magnetic. If it sticks to a magnet, it is not solid silver.

For a low mintage Proof, third-party grading is worth it. A slab from NGC or PCGS confirms authenticity and locks in a grade that buyers trust, which usually raises what you can get.

Where to buy or sell

Because the mintage is so low, this coin does not show up everywhere. Check the Pesoteca dealer directory to find serious buyers and sellers, compare offers, and avoid either overpaying a premium or dumping it for the price of scrap silver. If you also have one ounce pieces, our Libertad series page shows how the whole family compares.

Have a 5 oz Libertad and not sure if it is the Proof or the bullion version? Post the year and a clear photo of the edge and finish in the Pesoteca forum and we'll help you pin it down.

5 troy oz Libertad silver 2004 Proof

This piece is the 5 troy oz silver Onza Libertad, struck by the Mexican Mint in 2004 in its Proof version.

Technical data. It contains 155.5 g of pure silver fineness .999 and measures 65 mm in diameter. The reverse bears the effigy of the Angel of Independence, adopted by Banxico as the official symbol of the series since 1981. The obverse shows the National Coat of Arms in its pre-1969 version, alongside other historical coats of arms as the family's mark of identity.

Role within the set. It is the largest piece of the silver set and one of the scarcest in the annual program. Its mintage is usually under 20,000 examples, and its diameter close to that of a historical 5-peso ingot makes it recognizable in the hand. It is the serious collector's goal.

Context of the year. In 2004 Vicente Fox Quesada governed. The first physical silver ETF in the United States, the iShares Silver Trust, was launched. International demand for bullion silver took off.

Proof finish. The Proof finish, also known as mirror, is achieved by polishing the dies to a specular brilliance in the fields, while the relief is frosted by micro-sandblasting. The piece comes off the press ready for display: it is not touched in open air or handled without gloves. Banxico delivers it in a sealed plastic capsule with an individually numbered certificate of authenticity. The Proof mintage is always much lower than that of the regular finish of the same year, and its price on the secondary market is usually between 40% and 80% above the equivalent BU version.

Mintage. Banxico reported in its official tables a mintage of 3,351 pieces for this combination of fraction, year, and finish. That number is the basis for measuring the piece's relative scarcity within the program.