British Heptagonal Fifty Pence Coin (Queen Elizabeth II)

This item is a British fifty pence (50p) coin, which is notable for its unique equilateral curve heptagonal (seven-sided) shape. The coin is presented inside a protective circular blue-toned coin capsule, which is housed within a square display frame or slab. The obverse side shown features the right-facing profile of Queen Elizabeth II, likely the 'Second Portrait' by Arnold Machin, as suggested by the crown and necklace details, which would date the coin's mintage to between 1969 and 1984. It is struck in cupro-nickel, giving it a silver-colored metallic appearance. The surface exhibits a soft patina consistent with circulation or age, though the high-relief details of the hair and crown remain visible. No specific mint marks are clearly discernable in the current low-resolution state, but it represents the standard decimal currency of the United Kingdom from the late 20th century. The rim is smooth, following the seven-sided geometry of the flan. The condition appears to be 'Fine' to 'Very Fine,' with some surface dulling and minor abrasions visible through the plastic casing, but no significant damage or structural deformation is present. The capsule and outer framing suggest this may have been part of a collector's set or an individual piece preserved for its numismatic interest.