1953 ELIZABETH II PROOF 1 PENNY Bronze • 9.45 g • 30.8 mm KM# 883, SP#4154

1953 British One Penny coin, featuring Queen Elizabeth II on the obverse (not shown in your image, but implied by the date and source information) and the seated figure of Britannia on the reverse, along with the denomination "ONE PENNY" and the date "1953". This particular year is notable as it marks the coronation year of Queen Elizabeth II.
Here's some information about this coin:
Design: The reverse, depicted in your image, features Britannia holding a trident and resting on a shield bearing the Union Flag, with a lighthouse in the background to the left.
Mintage: While pennies were not needed for general circulation in large numbers in 1953 due to ample existing coins, a significant number of 1953 pennies were produced specifically for inclusion in Royal Mint Coronation sets sold to the public. The circulation mintage was 1,308,400.
Material: The coin is made of bronze.
Demonetization: This coin, along with other pre-decimal British pennies, was demonetized on August 31, 1971

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