Gold Sovereign - Elizabeth II - First Portrait - 1957-1968
Sovereigns were reintroduced in 1957 using the First Portrait, although the same portrait had also been used for other denominations in 1953 with different wording. This first type was issued until 1968. The coins of 1957 have a finer grained milled edge.
The Italians call these "Fiocchi" referring to the ribbons in the Queen's hair.
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Gold Half Sovereign - Elizabeth II - Second (Decimal) Portrait - 1968-1984