10 Centavos 1937 (Cupronickel): Value & How to Spot the Real One

The 1937 Mexican 10 centavos in cupronickel is worth about 8 USD in worn condition and up to 250 USD in near-mint grade. It has no silver, so all of its value is collector demand, and a low mintage year (3,000,000 pieces) makes it one of the more sought-after dates in its series. Here is what yours is actually worth and how to check it is genuine.

What it's worth in 2026

This coin carries zero metal value. It is 80% copper and 20% nickel, so you cannot melt it for a profit. Every dollar it commands comes from collectors, and that means condition (grade) decides almost everything.

Using catalog references (Silver Age Coins) as a guide, here is the range:

Grade	Approx. value (USD)
Good (heavily worn)	8
Fine	45
Very Fine	98
Extra Fine (EF)	215
About Uncirculated (AU)	250

A heavily circulated example is easy to find and sells for very little. The money is in the high grades: EF, AU, and Uncirculated pieces with original luster are where prices climb. If your coin looks crisp, with sharp detail on the outer rings of the design, it is worth getting a real grade opinion before you sell.

Why the 1937 is a "key date"

The 1937 belongs to the 1936 to 1946 cupronickel series. Its mintage was 3,000,000 pieces, lower than most other years in the run, which is why many sellers label it a key date. That said, plenty of them circulated hard, so worn examples are not rare. The genuine scarcity, and the real value, sits in well-preserved high grades. Do not overpay for a beat-up one just because you saw the words "key date."

What the coin actually looks like

This is a small, gray-white coin. Getting the specs right is the fastest way to confirm you have the correct type (KM#432):

• Weight: 5.5 grams
• Diameter: 23.5 mm
• Thickness: 1.75 mm
• Edge: plain (smooth)
• Composition: cupronickel, 80% copper / 20% nickel (no silver)

The reverse shows the outer rings of the Piedra del Sol (the Aztec Sun Stone, often called the Aztec calendar), with the denomination 10 CENTAVOS in the center, the date 1937, and the mint mark M for the Casa de Moneda de México. The obverse carries the Mexican national coat of arms (an eagle on a cactus with a snake). The design is by Manuel Luna Negrete.

A quick note on the source description: if you find a listing calling this coin 1.52 grams and 15 mm, that refers to a different, smaller type. The 1937 cupronickel 10 centavos (KM#432) is the 5.5 gram, 23.5 mm piece described above. Check the weight and diameter first.

How to tell if yours is genuine

Counterfeits of a low-value coin like this are uncommon, but wrong-type confusion is very common. Run these checks:

1. Weight: it should hit 5.5 grams. A digital scale settles most doubts.
2. Diameter: 23.5 mm across.
3. Edge: plain and smooth, no reeding.
4. Color and magnetism: cupronickel is a silvery gray, not golden. It is only weakly magnetic at most. A strongly magnetic coin is not this type.
5. Design: the reverse rings of the Sun Stone should be sharp, with a clear M mint mark.

If the numbers are off or the metal looks wrong, you are likely holding a different denomination or a later restrike, not the 1937 cupronickel.

Where to sell it

Don't take the first offer, especially if your coin grades EF or better. A worn example is worth a few dollars and moves easily; a high-grade piece is where you want a second opinion. Compare prices and grades with established dealers before you commit. You can browse the Pesoteca dealer directory to see what real sellers are asking for the same date and grade, and ask for a grade reference on any coin you think is high-end.

If you inherited a mix of old Mexican coins, this one is a good example of why "old" does not mean "valuable": age alone means little, and the real drivers are mintage, demand, and grade. Have any of your coins graded before assuming a windfall. What grade do you think yours is in? Post clear photos in the Pesoteca forum and let collectors weigh in.

Centavo coins form the base of the Mexican monetary system. Banxico has modified their diameters, materials, and alloys several times over the past decades to optimize minting costs. The 10-centavo Cupronickel piece struck in 1937 belongs to the Banxico Numismatic Collection catalog documented on its official site.

For Mexican collectors, centavo pieces have value when they capture a change of material, a die error, or an atypically low mintage. Banxico has published annual mintages in CM10 since the year 2000. For earlier pieces the data may not be available. This entry follows the convention of the PSM System, one ID per distinct physical piece, not per shared design.