In the UK before 1971 the currency was made up of 20 shillings and each shilling consisted of 12 old pence, so 240 pennies in a pound. It was based on the very old Roman libra, solidus, and denarius (so it was Italian ). The existing pound sign £ still looks like an 'L' and old pennies were suffixed with a 'd' so e.g. 6d was sixpence.
It wasn't called 'pre-decimal' at the time but afterwards when everything was decimal (e.g. the pound remained the same but was made of 100 new pennies) the older style division of the pound into shillings and old pennies became known as pre-decimal.