Shilling

The shilling was a form of currency used in Great Britain up through the mid 20th century. Its value was a twentieth of a pound sterling or twelve pence. Susan Foreman, being a time traveller, had visited Britain's future before. Confused, she could not remember how many shillings were in a pound when she and the First Doctor settled down in 1963 London. She thought that they had already decimalised the currency. (TV: An Unearthly Child)


 * Interestingly, with An Unearthly Child set and broadcast in 1963, Susan accurately predicts that England would switch to decimal currency, which in the real world was announced in 1966 and occurred in 1971.