1967 for 50 cents and dollars, 1968 (at reduced silver content) for 10 and 25 cents.
It was 1964 when the last coins in the US were made from 90% silver.
1964 was the last year for 90% silver coins and 1970 was the last for 40% silver coins. Special Bicentennial (1776-1976) collectors coins were made in 40% silver. From 1992 to date proof collectors coins have been struck in 90% silver.
Quarters and most other silver US coins contained 10% copper; the last coins made of that alloy were dated 1964. The US has never made solid silver circulating coins. Pure silver is far too soft for use in coins, so it was always alloyed with copper for hardness.
In general circulation US coins, the 90% silver coins were last made in 1964. Some proof sets made later contain more silver than the general circulating coins. The Peace dollars made 1921-1935 were the last 90% silvers, some Eisenhower dollars made 71-76 were 40% silver.
in the US silver coins were last used in 1964, the reason behind the overhaul of coins of which several were heavily made with silver, was available quantities of this precious metal were rapidly decreasing and keeping up with demand for new coins increasingly difficult
Because silver is far too expensive. Coins used to contain silver until about 1920 in the UK, 1965 in the U.S., and 1968 in Canada. Since then they are made from a mixture of copper and nickel, so they really aren't called "silver" coins anymore.
The rising price of silver forced Canada to reduce, then eliminate silver from its coins in 1968. Those minted early in the year were made of 50% silver, 50% copper. Those minted later were made of pure nickel. Nickel is attracted to a magnet, so a 1968 coin that does not stick to a magnet must be an early half-silver coins.
The last year for the Canadian silver 5-cent piece was 1921, except those coins weren't called nickels because they didn't contain any nickel. The Canadian nickel (actually made of nickel) was then introduced in 1922.
Dollar coins in the United States stopped being made of silver in 1935. The last silver dollar coins were the Peace dollars, which were produced until that year. After 1935, dollar coins were primarily made of a copper-nickel alloy. The move away from silver was part of a broader shift in U.S. coinage during the Great Depression.
The last circulating silver coins in England were struck in the 1946. Since then any silver-colored coins, including your 10p piece, have been made of copper-nickel.
In the Philippines the last year of silver coins was ... 1945 10 centavos 1945 20 centavos 1947 50 centavos 1967 1 peso
Canada stopped using silver in its coins in 1968. Your quarter is made of nickel and worth face value only.