In what decade did cupro-nickel replace silver in British coins?
Indian rupee coins identical in size to the sovereigns as an emergency measure during the First World War. In the early 1940s, several changes were implemented. The anna and pice ceased production, the anna was changed to a bronze, holed coin, cupro-nickel and nickel-brass -anna coins were introduced, nickel-brass was used to produce some one- and two-annas coins, and the silver composition was reduced from 91.7 to 50 percent. The last of the regal issues were cupro-nickel -, - and one-rupee pieces minted in 1946 and 1947, bearing the image of George VI, King and Emperor on the obverse and an Indian
Angolan escudo In 1927, cupro-nickel 1, 2 and 4 macuta and 50 centavo coins were introduced. These coins continued to circulate when the angolar was introduced, with bronze 10 and 20 centavo coins introduced in 1948. In 1952, the first escudo coins were introduced, although the escudo did not officially replace the angolar until the end of 1958. Silver 10 and 20 escudos were introduced in 1952, followed by bronze 50 centavos and 1 escudo, and cupro-nickel 2½ escudos in 1953. Cupro-nickel replaced silver in the 10 escudos in 1969, with nickel replacing silver in the 20 escudos in 1971. Cupro-nickel 5