Obverse: identify the front

The national-arms obverse shows an eagle facing left and the ESTADOS UNIDOS MEXICANOS legend. Its country design helps identify the issuer but is shared with other Mexican coins and does not prove 30% silver.

Reverse: identify the back

The reverse places a balance scale below a Liberty cap, with 25 Cs., the Mo mark and date. The representative source records 1951. The scale-and-cap theme also occurs on earlier higher-fineness 25 centavos, so its small 21.5 mm diameter and actual year matter.

History and purpose

KM 443 covers the four actual annual issues 1950, 1951, 1952 and 1953. At 30% silver this small billon coin is a different standard from the nineteenth-century .90325 centavos. A change in alloy or nominal mass changes fine silver content even when the denomination and symbolic imagery are familiar.

How to identify this variant

Identify both faces and read the complete 25 centavos denomination and date. The included standard has 3.333 g nominal gross mass, 0.3 silver fineness and 21.5 mm diameter. Nineteenth-century .903 twenty-five centavos, patterns, tokens and other coins carrying 25 are excluded. Wear may reduce measured mass; a magnet, bright surface or photograph alone cannot determine precise alloy. Keep an uncertain specimen separate until its type is verified.

Understanding its metal content

The calculator uses the reference’s designated 0.0321 fine silver troy ounce for each matching coin. Three coins contribute 9.999 nominal gross grams and 0.0963 reference fine silver troy ounces. Gross grams include alloy and must not be treated as pure silver grams. Troy and avoirdupois ounces are different units. Dollar melt pricing is unavailable until an approved provider supplies a current market quote; no missing quote is shown as zero.

Dates, varieties and composition changes

Specific annual years are 1950, 1951, 1952, 1953. The inspected reference table supplies four annual rows without separately listed overdates or proof rows. That absence is a limit of this inspected reference, not proof that every die variety has been catalogued.

Melt value versus collector value

Preserve each specimen’s actual date, design attribution, finish, original surfaces and provenance. A date, die variety or condition may affect collector interest independently of silver content. The calculated metal amount does not establish rarity, grade or an offer. Avoid cleaning or polishing and retain any reputable certification rather than interpreting shine as proof manufacture.

Authenticity and condition

A representative 1951 photograph can illustrate an included design but cannot certify another specimen or assay its silver. Supply complete obverse, reverse and edge photographs with measured weight and diameter for identification. Patterns, plated pieces, cast copies and uncertain regional issues require separate investigation. The pictured faces do not independently prove an unseen edge or finish.

Selling this coin

Sort 25 centavos pieces by actual type, issue year and composition before adding quantities. Keep different standards and uncertain coins in separate groups. CashForCoins’ existing photo-appraisal link can carry the selected coin and quantity into an enquiry. Authentication, condition and collector demand may affect an actual offer alongside metal; this educational calculator is not a buying bid.

Sources and calculation methodology

The designated reference World Silver melt reference supplies 3.333 g gross mass, 0.3 silver fineness and 0.0321 reference fine silver troy ounce. Matching dated KM 443 records supply actual annual rows, 21.5 mm diameter, designs and mint notes. Thickness and the identities of remaining alloy metals are not independently verified. Dates are read from matching annual rows rather than inferred from a broad melt-group heading. The reference valuation tables, mintages and articles are not republished. The proposed main obverse/reverse photographs are credited to Numismatica Quetzalcoatl under CC BY 4.0 on Numista; unrelated edge and comparison photos are excluded.

The actual dated representative photographs and independent reuse permissions were inspected. Complete faces are retained, with WebP conversion and no enlargement, retouching or synthetic reconstruction; joined source images are split with complete rims. These photographs do not assay another specimen. Actual staging rendering and calculator acceptance are separately recorded.

Common questions

References

• NGC designated World Silver Coin Melt Values — designated weight; fineness; reference silver ounces; broader group heading (checked 2026-10-12)
• NGC matching dated Mexican type KM443 — dated identity; weight; fineness; diameter; actual dates from annual rows; design; mint and variety notes (checked 2026-10-12)
• Licensed representative main photo pair by Numismatica Quetzalcoatl — main obverse/reverse photographicCCBY4.0permission; credited creator; acquisition and visual identity pending (checked 2026-10-12)

Issue-year references

• NGC designated World Silver Coin Melt Values
• NGC matching dated Mexican type KM443
• Licensed representative main photo pair by Numismatica Quetzalcoatl

Content maintained by CashForCoins. Last substantive record update: 2026-10-12. Report a specification or attribution issue through our contact page.

Related coins

Mexican Historical .903 Silver 25 Centavos

Photo credits and rights on the linked coin profile.

Mexico • Designated .903 silver reference; dated precision differences disclosed

Issue years: 1869–1890 and 1892

Fine silver: 0.196500 troy oz

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