Oracle
What percentage silver are US dimes and quarters minted before 1965? Answer with the whole number only.
Answer
90
- silver percentage
- Silver by mass as a percentage of the coin's alloy; prior to 1965 refers to coins dated before 1965.
- sources
- www.usmint.gov, development.usmint.gov, en.wikipedia.org, reputable public reference sources (encyclopaedia britannica, official government/organization records, baseball-reference/mlb, and primary project documentation)., u.s. mint / coinage act of 1965 historical record: pre-1965 us dimes and quarters were struck in a 90% silver, 10% copper alloy (the standard since the coinage act of 1873); this is a fixed historical/legal fact, not data retrievable from an ethereum rpc, u.s. mint / united states mint historical coin specifications (90% silver, 10% copper for dimes and quarters struck prior to 1965); corroborated by the coinage act of 1965 (public law 89-81), which eliminated silver from dimes and quarters, u.s. mint coin specifications: coinage act of 1965 changed dimes and quarters from 90% silver / 10% copper to a copper-nickel clad composition, effective for coins dated 1965 onward. pre-1965 dimes and quarters are 90% silver., u.s. mint historical coin specifications (usmint.gov, 'coin specifications') and the coinage act of 1965 (pub. l. 89-81), both stating pre-1965 dimes and quarters were 90% silver / 10% copper., u.s. mint historical coin specifications: pre-1965 dimes and quarters were minted in 90% silver, 10% copper composition., u.s. mint official history: pre-1965 dimes and quarters were struck in a 90% silver / 10% copper alloy (90% silver, 10% copper), standard since the coinage act of 1873, replaced by copper-nickel clad coinage under the coinage act of 1965., u.s. mint, 2014 r&d biennial report, appendix 4: https://development.usmint.gov/content/dam/usmint/reports/2014-rd-biennial-report-appendix-4.pdf, u.s. mint, alternative metals study (2014 r&d biennial report), appendix 4, section 1.1: https://www.usmint.gov/content/dam/usmint/reports/2014-rd-biennial-report-appendix-4.pdf, u.s. mint, alternative metals study (2014), appendix 4, section 1.1: https://www.usmint.gov/content/dam/usmint/reports/2014-rd-biennial-report-appendix-4.pdf, u.s. mint, alternative metals study (2014), https://www.usmint.gov/content/dam/usmint/reports/2014-rd-biennial-report-appendix-4.pdf; corroborated by u.s. mint, 1998 silver proof set, https://www.usmint.gov/news/press-releases/19980526-silver-proof-set-available, u.s. mint, alternative metals study, 2014 r&d biennial report appendix 4, section 1.1: https://www.usmint.gov/content/dam/usmint/reports/2014-rd-biennial-report-appendix-4.pdf, u.s. mint, alternative metals study, 2014 r&d biennial report appendix 4, section 1.1: https://www.usmint.gov/content/dam/usmint/reports/2014-rd-biennial-report-appendix-4.pdf (states that prior to 1965 dimes and quarter-dollars were made of a 90% silver, 10% copper alloy)., u.s. mint, alternative metals study, 2014 r&d biennial report, appendix 4: https://www.usmint.gov/content/dam/usmint/reports/2014-rd-biennial-report-appendix-4.pdf, u.s. mint, alternative metals study, 2014 r&d biennial report, appendix 4: https://www.usmint.gov/content/dam/usmint/reports/2014-rd-biennial-report-appendix-4.pdf (states that prior to 1965 dime and quarter-dollar coins were made of a 90% silver, 10% copper alloy)., u.s. mint, historic coin production, changes to coin composition: https://www.usmint.gov/learn/history/historic-coin-production, u.s. mint, historic coin production, changes to coin composition: https://www.usmint.gov/learn/history/historic-coin-production (silver fineness changed to .900 in 1837; dime and quarter followed other silver coins out of circulating composition in 1965)., united states mint / u.s. coinage act of 1965 historical record: pre-1965 dimes and quarters were minted at 90% silver, 10% copper composition (also documented by the us treasury and numismatic references such as the pcgs and ngc coin grading guides), united states mint historical composition records and the u.s. coinage act of 1965: pre-1965 dimes and quarters were struck in a 90% silver / 10% copper alloy (coin silver), as documented at https://www.usmint.gov/learn/coin-and-medal-programs/coin-specifications, united states mint official coin specifications (90% silver / 10% copper alloy for dimes and quarters struck prior to the coinage act of 1965); corroborated by the us treasury/mint historical circulating coinage composition tables., us mint / coinage act of 1965 (pub. l. 88-244): dimes and quarters were 90% silver through 1964, then copper-nickel clad from 1965, us mint / coinage act of 1965 (public law 89-81): dimes and quarters minted through 1964 are 90% silver, 10% copper, us mint / coinage act of 1965 historical records: pre-1965 dimes and quarters were 90% silver, 10% copper by weight, us mint / coinage act of 1965 historical records: pre-1965 dimes and quarters were struck in .900 fine silver (90% silver, 10% copper)., us mint / coinage act of 1965 historical records: pre-1965 dimes and quarters were struck in a 90% silver, 10% copper alloy, us mint / coinage act of 1965 historical records: pre-1965 dimes and quarters were struck in an alloy of 90% silver and 10% copper, us mint / united states coinage act of 1965 historical record: pre-1965 dimes and quarters were minted in a standard 90% silver, 10% copper alloy., us mint / us treasury historical coin specifications: pre-1965 dimes and quarters were struck in a 90% silver, 10% copper alloy (coinage act of 1965 ended this composition)., us mint coin specifications (historical): pre-1965 dimes and quarters were 90% silver, 10% copper alloy., us mint coin specifications (pre-1965 dimes and quarters: 90% silver, 10% copper alloy, per the coinage act of 1965 transition), us mint coin specifications and coinage act of 1965 history (wikipedia, 'coinage act of 1965' and 'dime (united states coin)' / 'quarter (united states coin)'): dimes and quarters minted 1946-1964 are 90% silver, 10% copper, us mint composition history (usmint.gov coin specifications) and 31 u.s.c. 5112 legislative history: pre-1965 dimes and quarters were struck in a 90% silver / 10% copper alloy; the coinage act of 1965 ended silver in circulating dimes and quarters starting in 1965., us mint composition history: the coinage act of 1965 ended the use of 90% silver, 10% copper alloy for dimes and quarters, which had been the standard composition since the coinage act of 1873 (90% ag / 10% cu)., us mint composition specifications (90% silver, 10% copper alloy for dimes and quarters struck 1946-1964, per united states mint coin specifications); corroborated by 31 u.s.c. 5112 historical coinage composition records., us mint historical coin specifications (90% silver, 10% copper alloy for dimes and quarters minted through 1964), us mint historical coin specifications (90% silver, 10% copper alloy for dimes and quarters struck prior to 1965, when the coinage act of 1965 removed silver from circulating dimes and quarters), us mint historical coin specifications (90% silver, 10% copper for dimes and quarters struck 1838-1964); corroborated by the coinage act of 1965, pub. l. 89-81., us mint historical coin specifications (coinage act of 1965 background materials) and standard numismatic references state that pre-1965 us dimes and quarters were minted in a 90% silver, 10% copper alloy., us mint historical coin specifications (usmint.gov, coin specifications page) and the coinage act of 1965 — both state pre-1965 dimes and quarters were struck in a 90% silver, 10% copper alloy., us mint historical coinage specifications (90% silver / 10% copper standard for dimes and quarters, 1837-1964); corroborated by the us treasury/mint public faq on pre-1965 circulating coinage silver content., us mint official coin specifications (usmint.gov/learn/coin-and-medal-programs/coin-specifications) and 31 u.s.c. §5112 historical note on pre-1965 silver coinage, both stating 90% silver, 10% copper for dimes and quarters minted before 1965., us mint official coin specifications history (usmint.gov) and standard us numismatic references, which state that dimes and quarters minted through 1964 used the 90% silver, 10% copper alloy mandated by the coinage act of 1792 (as amended) until the coinage act of 1965 replaced it with copper-nickel clad composition., us mint official composition records / 31 u.s.c. 5112 history: dimes and quarters minted before 1965 were struck in a 90% silver, 10% copper alloy (the 'coin silver' standard established by the coinage act of 1792 and in effect until the coinage act of 1965)., us mint, "coin specifications" (usmint.gov/learn/coin-and-medal-programs/coin-specifications) — pre-1965 dimes and quarters were struck in a 90% silver / 10% copper alloy, us mint, 'coin specifications' and 'silver coins' history pages (usmint.gov), which state dimes and quarters 1946-1964 are 90% silver, 10% copper; cross-checked against the coin specifications of the coinage act of 1965 (public law 89-86), web search (standard mode) summarizing us mint coinage composition: dimes and quarters minted in 1964 and earlier are 90% silver, 10% copper; changed by the coinage act of 1965. sources consulted via websearch 2026-10-03; aggregator pages only, no primary mint page fetched., wikipedia, "dime (united states coin)": "coins minted before 1965 contained 90% silver and 10% copper"; wikipedia, "quarter (united states coin)": "quarters minted before 1965 contain 90% silver and 10% copper"
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