Decimal Day use pennies or threepenny pieces, to pay them in multiples of 6d (p, the lowest common multiple of the two systems). Bus companies (at that time many state-owned by the National Bus Company) were another exception, going decimal on Sunday 21 February. Decimal Day itself went smoothly. Criticisms included the small size of the new halfpenny coin and the fact that some traders had taken advantage of the transition to raise prices. Some used new pennies as sixpences in vending machines. After 15 February, shops continued to accept payment in old coins, but always issued change in new coins. The
Indian rupee "athanni"; 50 naye paise equalled 8 old annas) and 1-rupee coins were nickel. In 1964, the word "naya(e)" was removed from all coins. Between 1957 and 1967, aluminium one-, two-, three-, five- and ten-paise coins were introduced. In 1968 nickel-brass 20-paise coins were introduced, and replaced by aluminium coins in 1982. Between 1972 and 1975, cupro-nickel replaced nickel in the 25- and 50-paise and the 1-rupee coins; in 1982, cupro-nickel two-rupee coins were introduced. In 1988 stainless steel 10-, 25- and 50-paise coins were introduced, followed by 1- and 5-rupee coins in 1992. Five-rupee coins, made from brass, are being