Mexico • 1 peso
A matching Mexican .500 silver peso contains 0.225 reference fine silver troy ounce using the designated reference melt table. Actual included years are 1947–1949. Confirm denomination, complete date, both designs, nominal 14 g mass and 32 mm diameter before combining a quantity. Different Mexican coins sharing the denomination can contain different amounts of silver.
When a fresh spot bid is available, melt values use fine-metal content × spot bid. CashForCoins guide buying offers use the separately configured percentage for each metal. Selected rare/numismatic coins require an appraisal. Dollar amounts remain unavailable when a fresh quote or buying percentage is missing.
Exact reviewed annual face/issue years for the assigned standard, retaining mint and design gaps. Overdate undernumerals and commemorative life dates do not add annual issues. Separate alloys, weights, designs and finish availability are explained in the guide.
Formula: specified fine-metal troy ounces × quantity. Dollar melt value additionally requires an approved current metal price.
The reference describes an eagle-left national-arms obverse. The issuer’s familiar arms must be paired with the correct portrait, date, nominal 14 g mass and .500 standard.
The reference describes a right-facing head with a head covering. The matching Morelos portrait peso differs from the following 1950 three-quarter-left .300 design despite both being 32 mm.
KM 456 is a 14 g, .500 silver standard covering 1947, 1948 and 1949. The reference marks 1949 as not released for circulation and lists a separate 1949 proof row. That release note matters when interpreting a purported circulated specimen; the calculator does not determine its authenticity or finish.
Match the complete 1 peso denomination and included issue years. The designated standard is 14 g gross mass, 0.5 silver fineness and 32 mm diameter. Keep unrelated alloys, gold coins, regional issues, patterns and replicas separate. Wear can reduce mass; appearance, a magnet or a household scale cannot alone determine precise alloy or authenticate the coin.
Three matching coins contribute 42 nominal gross grams and 0.675 reference fine silver troy ounces. The calculator uses 0.225 oz per coin rather than treating total alloy mass as pure silver. Dollar melt pricing requires an approved current market quote; absent pricing is not shown as zero. Collector demand and condition remain separate from metal content.
Actual annual years are 1947, 1948 and 1949. The reference records 1949 as not released for circulation and also lists a 1949 proof row. The proof row does not create another annual year or establish that any bright 1949 coin is proof. Banco de México’s gallery illustrates the 1947–1948 type; the dated reference record supplies the additional 1949 chronology.
An attributed overdate, die variety, date, finish, condition or provenance may influence collector interest independently of silver content. The metal calculation cannot determine grade, rarity or collector value. Avoid polishing or cleaning; preserve original surfaces, any established provenance and reputable certification. A worn piece and an uncirculated example of the same nominal standard can have different collector values.
A photograph of another denomination or alloy must not be used as this type’s illustration. Complete authentic obverse, reverse and edge views, measured mass and diameter help investigate a specimen but are not a silver assay. Plated pieces, cast copies, unlisted patterns and doubtful dates require individual attribution. Avoid cleaning or inferring a proof finish from shine.
Sort 1 peso coins by complete date, design and nominal metal standard before entering quantities. Send clear photographs of both sides, plus edge photographs and measured weight where available, when requesting a CashForCoins appraisal. Preserve possible overdates and unusual die details for individual review. An offer can depend on authenticity, condition and collector demand alongside metal content. The reference melt calculation is an educational estimate.
The designated reference melt table gives 14 g gross mass, .500 fineness and 0.225 fine silver troy ounce. The matching dated KM 456 table gives 0.2251 oz. This guide discloses the 0.0001 oz reference difference while using the designated 0.225 oz calculation. Dated annual rows establish 1947, 1948 and 1949 and the 32 mm diameter. Thickness and the proportions of remaining alloy metals are unspecified.
Photographs are attributed to their independently documented source. Small Banco de México images are reproduced at their original resolution under the institution’s published use permission, with attribution and source URL. A representative photograph does not authenticate or assay another specimen.
Content maintained by CashForCoins. Last substantive record update: 2026-10-12. Report a specification or attribution issue through our contact page.
Photo credits and rights on the linked coin profile.
Mexico • 72% silver; remaining alloy metals not independently verified
Issue years: 1920–1927, 1932–1935, 1938, 1940, 1943–1945
Fine silver: 0.385600 troy oz
Photo credits and rights on the linked coin profile.
Mexico • 30% silver; remaining alloy metals not independently verified
Issue years: 1950
Fine silver: 0.128600 troy oz
Photographs can help identify your coin. An appraisal may consider authenticity, condition and collector demand as well as metal content.
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