On the day of the official change to decimalized currency on Feb. 15, 1971, Lord Fiske, chairman of the Decimal Currency Board, makes a purchase at a Woolworths store in London.

15th February 1971: On the day of the official change to decimalised currency, Lord Fiske, chairman of the Decimal Currency Board, makes a purchase at a Woolworths store in London. (Photo by George W. Hales/Fox Photos/Getty Images)