The British fifty pence (50p) coin - often pronounced as "fifty pee" - is a unit of currency equalling one half of a Pound Sterling. It is a seven-sided coin formed as an equilateral-curve heptagon, or Reuleaux polygon - a curve of constant width, meaning that the diameter is constant across any bisection. This shape, which was revolutionary at the time of its introduction, makes it easily distinguishable from round coins both by feel and by sight, while its constant breadth allows it to roll in vending machines.
The first UK Fifty Pence coin was issued in 1969 with the classic Britannia reverse design by Christopher Ironside, which was superseded in 2008 by the Matthew Dent design for circulation coins.The denomination is also extensively used to issue circulating commemorative coins.
Beginning in 2009, the Royal Mint started issuing 50 pence coins for collectors - such as this one - which are not meant to be released in circulation, so are classified as Non-Circulating Legal Tender (NCLT).
This coin continues the tradition of winter issues of 50 pence coins with The Snowman children story character.
The Royal Mint says:
"It’s not officially the festive season until the whole family sit down together to watch The Snowman. Raymond Briggs’s wordless picture book was beautifully brought to life in an animated film that has become essential Christmas viewing. And the story of the little boy whose snowman magically comes to life continues to enchant each new generation. The magic returns to The Royal Mint with our second ever Snowman coin. Struck in fine silver, it features an original design that captures the bond between the little boy and his new best friend."
The coins were issued in a variety of collector formats. No coins of this type were issued into circulation. | 
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