The Aluminium coin series (1964 – 1999): Rising costs and high inflation led to the introduction of aluminium 1,2,3,5 and 10 paise coins during 1964 to 1968 , as against the cupro-nickel and nickel brass coins which were in use hitherto. Although referred to as the Aluminium coins, they were a mixture of Aluminium Bronze for some years for some coins and a mixture of Aluminium Magnesium for the later part of their production. A 20 paise circular coin as well as a 10 paise scalloped coin…