This legend was displayed on British gold bullion coinage between 1974 and 1984 during the reign of Queen Elizabeth II. By long-standing tradition, the legends of ruling British monarchs are rendered in Latin. On coinage, these are abbreviated because of the limited space available.
Below, you can find a list of the individual coins that have this legend on their obverse.
Note: on most coins the legend is rendered as + ELIZABETH · II · DEI · GRATIA · REGINA · F : D : (starting with a cross) for which see separate list.