Non-decimal currency Non-decimal currency A non-decimal currency is a currency that has sub-units that are a non-decimal fraction of the main unit, i.e. the number of sub-units in a main unit is not a power of 10. Today only two countries in the world use non-decimal currencies. Both of these countries are in Africa. These are Mauritania (1 ouguiya = 5 khoums) and Madagascar (1 ariary = 5 iraimbilanja). However these are only theoretically non-decimal, as in both cases the value of the main unit is so low that the sub-unit is too small to be of any practical use and coins
Penny (British pre-decimal coin) relates to coins minted with that particular mint mark. "H" refers to the Heaton Mint, and "KN" to the King's Norton Mint, both of which were contracted to mint supplemental pennies on occasion. From 1825 to 1970 a total of 3,629,384,952 pennies were minted. Penny (British pre-decimal coin) The pre-decimal penny (1d) was a coin worth of a pound sterling. Its symbol was d, from the Roman denarius. It was a continuation of the earlier English penny, and in Scotland it had the same monetary value as one pre-1707 Scottish shilling. The penny was originally minted in silver, but from