1/20 oz Silver Libertad 2006 Proof: Value & Prices

If you have a 2006 1/20 oz Silver Libertad in proof, you own one of the scarcer small-format pieces from Mexico's most collected modern silver series. With just 3,300 struck, this coin trades well above its tiny melt value, driven by low mintage and collector demand rather than metal content.

The Onza Libertad (Spanish for "Liberty Ounce") is Mexico's flagship silver bullion and collector series, minted by the Casa de Moneda de México and issued through Banxico, the country's central bank. The design shows the Winged Victory (Ángel de la Independencia) on the reverse and the national coat of arms on the obverse. The 1/20 oz is the smallest denomination in the fractional set, so a proof example is a specialty item, not a stack-it-away bullion piece.

What this coin is

This is a 1/20 troy ounce silver coin struck in 2006 with a proof finish: mirror-like fields and frosted, satin-textured devices. Proof coins are made from polished dies and specially prepared blanks, so they look sharper and glossier than a regular business strike. A proof Libertad this small was sold to collectors, not spent, so most surviving examples are in high grade.

Specifications

Spec	Detail
Weight	2.58 grams
Diameter	16 mm
Metal	Silver .999 (99.9% fine)
Edge	Reeded
Finish	Proof
Mintage	3,300 pieces
Series	Onza Libertad, fractional set

How much is it worth in 2026?

Be realistic about the metal first. At 1/20 of a troy ounce, this coin holds only about 0.05 oz of pure silver. Its melt value is a few dollars, so this is not a bullion play. The value here comes from the mintage of 3,300 and from demand for the complete fractional proof set.

What drives the real price:

• Grade and finish. A clean, cameo proof with untouched mirror fields sells for a premium. Hairlines, spots, or fingerprints (silver tones easily) drag the price down fast.
• Original Banxico packaging. The coin came in an official blister or capsule. With the original packaging and certificate, it sells for meaningfully more than a loose coin.
• Completeness. Collectors chasing the full 1/20, 1/10, 1/4, 1/2, and 1 oz proof set for 2006 will pay up for the missing fraction.

Because supply is thin and sales are infrequent, prices vary widely. A loose, mishandled example can trade for the price of the silver plus a modest premium. A pristine proof in original Banxico packaging, or one certified by NGC or PCGS in a high proof grade (PF69 or PF70), commands a strong multiple of that. When you see the whole fractional proof set offered together, the per-coin premium climbs further.

If you want to check the current range for your exact grade, compare recent sales on the Onza Libertad series page and read our coin grading guide before you assign a grade to your piece.

Is it rare?

With 3,300 minted, yes, by modern standards this is a low-mintage collector issue. For comparison, some standard bullion Libertads are struck in the hundreds of thousands or millions. Low mintage is exactly why this proof sits above melt. That said, a low mintage only translates into real money when the coin is genuine and in top condition, so grade matters as much as the number struck.

How to tell if yours is genuine

Since this is a precious-metal coin, verify before you buy or sell:

1. Weigh it. It should weigh 2.58 grams on a jewelry scale. A wrong weight is the fastest tell of a fake.
2. Measure it. The diameter is 16 mm. Check it with calipers against the spec above.
3. Inspect the finish. A real proof has deep mirror fields and crisp frosted devices. Flat relief, dull surfaces, or blurry lettering point to a counterfeit or a damaged coin.
4. Be wary of bargains. Any offer far below the silver value plus a collector premium is a red flag.

For an authoritative opinion, third-party grading by NGC or PCGS both authenticates and grades the coin, which also makes it easier to sell.

Errors and varieties

Genuine mint errors (off-center strikes, die rotation, doubled strikes) can add value if they are real and verifiable. Most "errors" posted online are post-mint damage: scratches, corrosion, or handling marks, not factory errors. If you think you have a genuine error, post clear photos on the Pesoteca forum and let the community weigh in before you assume a payday.

Where to sell it

Sell where you get a real appraisal, not a lowball. A verified numismatic dealer from the Pesoteca directory can value it on the spot, or you can list it in the Pesoteca buy-and-sell forum among collectors who understand the fractional Libertad set. Photograph the obverse, reverse, and edge, include the original Banxico packaging if you have it, and check the value range on this page first. Avoid dumping it to the first bidder on social media.

Have a 2006 fractional Libertad, or the full proof set? Post your photos and weight on the Pesoteca forum and get a straight answer on what it's worth.

1/20 troy ounce silver Libertad 2006 Proof

This piece is the silver Libertad of 1/20 troy ounce, struck by the Mexico City Mint in 2006 in its Proof version.

Technical sheet. It contains 1.55 g of pure silver, .999 fineness, and measures 16 mm in diameter. The reverse bears the effigy of the Angel of Independence, chosen by Banxico as the official symbol of the series since 1981. The obverse shows the National Coat of Arms in its pre-1969 version, along with other historical coats of arms as the family's mark of identity.

Role within the set. It is the smallest fraction of the set. It serves as an entry piece, a gift, or a first contact with the series: it costs little per piece but carries the highest premium in the family over the value of the silver it contains, because the die cost is spread across fewer grams.

Context of the year. In 2006 Vicente Fox Quesada was in office. Silver broke past 12 USD per troy ounce on an annual average. The program marked 25 years since the original decree of 1980.

Proof finish. The Proof finish, also known as mirror, is achieved by polishing the dies to a specular shine in the fields, while the reliefs are frosted by micro-sandblasting. The piece comes off the press ready to 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 far 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 3,163 pieces for this combination of fraction, year, and finish. That number is the basis for measuring the piece's relative scarcity within the program.