In 1954–1955, Acmonital (stainless-steel) 50- and 100-lira coins were introduced, followed by aluminium-bronze 20-lira in 1957 and silver 500-lira in 1958. Increases in the silver bullion price led to the 500-lira coins being produced only in small numbers for collectors after 1967. The 500-lira (and later the 1,000-lira) also appeared in a number of commemorative coin issues, such as the centennial of Italian unification in 1961. Between 1967 and 1982, two types of "paper money" were issued with a value of 500 lire. These were not issued by "Banca d'Italia", but directly by the government bearing the title "Repubblica Italiana".
In 1977, aluminium-bronze 200-lira coins were introduced, followed in 1982 by the bimetallic 500 lire. This was the first bi-metallic coin to be
