Mexico 100 Pesos 2009: 1 Kilo of Silver Coin Value

If you inherited a massive silver coin marked "100 Pesos" and dated 2009, you are holding one of the heaviest coins Mexico ever struck. This is not pocket change. It contains one full kilogram of .999 fine silver, which gives it a hard floor value in the hundreds of dollars, before any collector premium.

What it's actually worth in 2026

The short answer: this coin's value starts at its silver content and goes up from there.

A kilogram is 32.15 troy ounces of pure silver. Whatever silver is trading for on a given day, multiply it by roughly 32, and that is your rock-bottom melt value. At silver prices in recent years, that alone puts the coin in the range of several hundred to over one thousand USD in metal value, and the number moves with the spot market every single day.

Because the coin is bullion (valued mainly for its metal), condition matters less than it would for a rare historical coin, but it still matters. Here is the general breakdown:

Condition	What it means	Typical value (USD)
Circulated / handled	Scratches, fingerprints, toning	Close to melt (silver spot x 32)
Uncirculated (UNC)	No wear, some handling marks	Melt plus a small premium
Certified MS-65 or higher	Graded by NGC or PCGS, near perfect	Melt plus a meaningful collector premium
With original Banxico packaging	Sealed capsule, box, certificate	Adds to the premium noticeably

If your coin still has its original Banco de México (Banxico is the central bank) capsule, box, and certificate of authenticity, keep everything together. Complete packaging can add a real premium on top of the silver.

The specs (verify yours against these)

These numbers are the fastest way to spot a fake or a mislabeled piece:

• Metal: .999 fine silver (99.9% pure)
• Weight: 1,000 grams (1 full kilogram)
• Diameter: 110 millimeters
• Edge: smooth (plain)
• Face value: 100 pesos (the legal tender value, which is a tiny fraction of what the silver is worth)
• Year struck: 2009 only

That 110 mm diameter is enormous, larger than a standard drink coaster. If your coin does not match that size and weight, you do not have this piece.

Is it rare?

Here is an honest answer instead of hype. Banxico did not publish an official mintage figure for this specific issue, which usually points to a limited, one-off numismatic release rather than a mass-circulation coin. Collector forums throw around numbers, but none of them are confirmed. Treat any "only X were made" claim you see online as unverified.

What we can say: it was struck in 2009 only, so there are no year varieties to chase. The value driver here is the kilogram of silver, plus a modest premium for the format and demand among collectors of Mexican silver.

How to tell if it's genuine

With a coin holding this much silver, verification is worth the effort.

1. Weigh it. A genuine piece is 1,000 grams. A cheap kitchen scale will catch most fakes instantly. If it is light, it is not solid silver.
2. Measure it. 110 mm diameter. Counterfeiters rarely nail both weight and size.
3. The ping test. Genuine .999 silver rings with a high, sustained tone when tapped gently. A fake or plated base metal sounds dull and short.
4. Get it certified. For a coin worth this much, professional grading by NGC or PCGS (the two major US grading services) is the definitive answer. They authenticate and grade it, and a slabbed coin sells faster and for more.

Where to sell it (US and international)

Because the value is mostly silver, you have solid options:

• A reputable coin dealer or bullion shop. They can weigh it, test it, and make an offer on the spot based on live silver spot plus any collector premium.
• Certified online marketplaces (Heritage Auctions, Stack's Bowers, or eBay for graded coins). Slabbed NGC/PCGS coins draw the strongest bids.
• Verified numismatic shops in the Pesoteca directory, listed by city, where you can get a real appraisal.
• The Pesoteca buy-and-sell forum, direct between collectors.

Whatever route you choose: never sell without knowing the day's silver spot price first. Anyone offering you "face value" of 100 pesos is trying to rob you. And photograph the obverse, reverse, and edge before you list it.

For a step-by-step read on condition, check the Mexican coin grading guide before you sell.

Have one of these kilo coins sitting in a drawer and want a read on its grade? Post clear photos in the Pesoteca forum and let the community weigh in.