A Mexican 50 pesos gold coin contains 37.5 grams of pure gold, which melts for $4,909.54 at a $4,072.10 gold spot price. That makes the coin — the Centenario — heavier in gold than a one-ounce coin: 1.2057 troy ounces of pure gold inside a 41.67 gram planchet struck at 90% fineness.
Melt value from Bullion Price Check, data as of November 8, 2026 (gold spot $4,072.10 per troy ounce). Melt is metal value only, before any premium, and excludes shipping and tax.
Centenario Specifications
The coin states its own key specification on its face — “37.5 Gr ORO PURO” (37.5 grams of pure gold) beside the Winged Victory. The full standard:
| Specification | Value |
|---|---|
| Total weight | 41.67 grams |
| Pure gold content | 37.5 grams (1.2057 troy oz) |
| Fineness | 90% (.900) |
| Diameter | 37 mm |
| Edge lettering | “Independencia y Libertad” |
| Struck | 1921–1947, Mexico City mint |
| Melt value (Nov 8, 2026) | $4,909.54 |
The 90% alloy — gold hardened with copper — is why a Centenario can circulate and be handled without the softness of a pure-gold coin, and why the total weight (41.67 g) is higher than the gold it contains (37.5 g). Any valuation starts from the pure content, never the gross weight.
Why It Is Called the Centenario
The 50 pesos was first struck in 1921, the centennial of Mexican independence in 1821 — the two dates flanking the Winged Victory on the obverse. The figure is the Angel of Independence, Mexico City’s monument, shown with the volcanoes Popocatépetl and Iztaccíhuatl behind her; the reverse carries the Mexican coat of arms, the eagle on a cactus. The design, credited to Emilio del Moral, proved so durable that the coin stayed in production for over two decades and the name “Centenario” now refers to the type as a whole, whatever the date on the coin.
The 1947 Restrikes: Why Most Coins Are Dated 1947
Original production ran from 1921 to 1947, but the story does not end there. Mexico later re-struck the coin from the 1947 dies — official restrikes were produced in 1949–1972 and again in later programs — which is why the great majority of bright, uncirculated Centenarios on the market today are dated 1947. A restrike is not a copy and not a fake: it is a genuine mint product with exactly the same weight, fineness, and gold content, and it trades on that gold content just like an original strike. Date matters to collectors of the early years — the first-year 1921 had a mintage of about 180,000 — but a 1947 is not worth less than other common dates, because all of them are priced from the same 37.5 grams of gold.
What a 50 Pesos Coin Is Worth
Start with melt: $4,909.54 at the November 8 spot price. Common-date Centenarios in uncirculated condition typically trade at a modest premium over that figure — usually a smaller percentage than the premium on a modern 1 oz bullion coin, because each Centenario delivers 1.2057 ounces in a single coin. Worked the other way, a buyer comparing a Centenario quote against a 1 oz coin should divide the price by 1.2057 before comparing premiums. Early dates, high grades, and certified examples can add collector value above the bullion math; worn or damaged common dates trade closest to melt. For the wider frame of how coin values are set, see our coin values guide.
Fakes and How to Check a Centenario
The Centenario is a well-known coin with real gold value, so counterfeits exist — including older copies struck for the jewelry trade. The checks are mechanical and need no expertise: weight on a precise scale should read 41.67 grams; diameter should measure 37 mm; the edge should carry the lettering “Independencia y Libertad,” not reeding or a blank edge; and gold is never magnetic, so any pull toward a magnet ends the discussion. A coin that fails on weight or diameter is not a Centenario whatever its design looks like. Buyers who want the Mexican companion in silver can read our Mexican Silver Libertad guide — the Libertad is the modern, .999 fine side of the same mint tradition.
Shop Mexican 50 Pesos
Genuine Centenarios in stock: the 1946 Mexico gold 50 peso in BU condition and our Mexico gold 50 peso listing (dates vary).
Mexican 50 Pesos FAQ
How much gold is in a Mexican 50 pesos coin?
37.5 grams of pure gold — 1.2057 troy ounces. The coin weighs 41.67 grams in total because it is struck at 90% fineness, with the balance in hardening alloy.
Is a 1947 Centenario worth less because it is a restrike?
No. The 1947-dated restrikes are genuine mint products with the same gold content as original strikes, and the market prices them the same way — from melt. Most uncirculated Centenarios for sale are dated 1947 for this reason.
Is the 50 pesos still legal tender?
It carries a 50 peso face value, but that figure is symbolic next to its gold content: the coin trades entirely on its 37.5 grams of gold, worth $4,909.54 at the November 8, 2026 spot price.
How does a Centenario compare with a 1 oz gold coin?
Each Centenario holds about 20% more gold than a one-ounce coin (1.2057 oz vs 1 oz), and common dates usually carry a lower percentage premium than modern bullion coins. The trade-off is fineness — 90% against .999 — which some refiners and buyers price in at resale.
Which Centenario date is the rarest?
The first-year 1921, with a mintage of about 180,000, is the scarcest date most collectors encounter, and it is the date most likely to bring a premium above the coin’s gold value.
Melt value: Data by Bullion Price Check, as of November 8, 2026. Values are approximate and move with spot. Educational content only — not financial advice.