Question: when did the silver threepenny piece go out of circulation
Answer: 5 % Ag ( 1920 -- 1946 ) 50 % Ag ( 1947 -- 1970 ) Nickel - brass ( 79 % Cu , 20 % Zn , and 1 % Ni ) Years of minting 1547 -- 1970 Obverse Design Profile of the monarch Reverse Design Various