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
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