1 Kilo Silver Aztec Calendar (100 Pesos, 2014): Value & Where to Sell

If you inherited a huge silver Mexican coin the size of a small plate stamped with the Aztec Calendar, you have a serious bullion piece. In 2026, the 2014 1-kilo silver 100 Pesos is worth over 1,000 USD in silver content alone, and more in top condition. This is not a rare-date rarity worth a fortune above metal, but it is real money.

Quick answer: what it's worth

The 2014 100 Pesos Aztec Calendar contains one full kilogram of silver. That is the key. One kilo equals about 32.15 troy ounces, so the coin's floor value tracks the silver spot price times roughly 32 ounces. When silver trades around 30 USD per ounce, the melt value alone is close to 1,000 USD. When silver runs higher, the coin follows.

Unlike small circulated coins, this piece almost never sells for less than its metal. Dealers and collectors treat it as a bullion-grade silver round with a numismatic design, so the metal sets a hard price floor.

What this coin actually is

Mexico issued a small series of large-format silver commemoratives depicting the Piedra del Sol, the Aztec Calendar stone housed in Mexico City. The 2014 version is the 1-kilo size with a matte-and-mirror (mate-brillo) finish, meaning the raised design is frosted while the background is polished. It carries a face value of 100 Pesos, which is symbolic. The silver is worth many times that.

Cataloged as KM#921, it was struck at the Casa de Moneda de México, the Mexico City mint that has produced coins continuously since the 16th century.

Specifications

Feature	Detail
Face value	100 Pesos
Year	2014
Metal	Silver
Weight	1,000 g (1 kilo)
Diameter	110 mm
Edge	Plain (smooth)
Finish	Matte and mirror (mate-brillo)
Catalog	KM#921
Mint	Casa de Moneda de México

At 110 mm across, this is not a pocket coin. Its size and weight are part of what makes it desirable to collectors of large silver.

Value ranges you can expect

Because the price is driven mostly by silver, here is how it breaks down. Note that spot silver moves daily, so treat these as reference points, not fixed quotes.

Condition	Approximate value (USD)
Damaged or heavily toned	Melt value (roughly 32 oz of silver)
Nice uncirculated, no case	Melt plus a small premium
Original mint packaging with certificate	Melt plus 10 to 25 percent
Certified top grade (NGC/PCGS)	Highest premiums, condition-driven

The original box and certificate of authenticity matter for these large commemoratives. A complete piece in its case commands a premium over a loose coin, because buyers of high-end bullion want the full presentation.

The myth to ignore

A giant, official-looking silver coin makes people assume it is worth many thousands. It is not, in the sense that its value comes from silver, not scarcity. This is a bullion commemorative, not a rare survivor. Do not let a Facebook buyer talk you into thinking it is priceless, and do not let one talk you into selling it below melt either. Anything offered well under the silver value is a bad deal for you.

The flip side: never assume it is "just a coin" worth face value. A hundred-peso face on a coin holding over 1,000 USD in silver is exactly the kind of thing people accidentally sell for pennies.

How to check what yours is worth

1. Weigh it. Use a jewelry scale. It should read very close to 1,000 grams. A genuine piece will not be light.
2. Measure the diameter. It should be 110 mm. Fakes often miss the exact size.
3. Check today's silver spot price. Multiply about 32.15 ounces by the current price per ounce to get your melt floor.
4. Assess condition. Look for scratches, spotting, and toning. The matte-mirror contrast should be crisp.
5. Confirm the packaging. Original mint case and certificate add value.

For a definitive figure, a verified numismatic shop from the Pesoteca directory can weigh and grade it in person. For a second opinion or to compare offers, post clear photos of the front, back, and edge in the Pesoteca forum.

Where to sell it

Because it is a precious-metal piece, sell to someone who handles bullion and shows you the coin and its weight before any money changes hands. Safest options are a numismatic shop in the Pesoteca directory, which values it on the spot, or the collector buy-and-sell forum. Avoid dumping it to the first bidder on social media, and be wary of any offer below silver value.

If you have more than one of these large silver commemoratives, or a full set of Aztec Calendar issues, what sizes and years did you inherit? Post them in the Pesoteca forum and let the community help you value the group.