Comparison between two different printings of 1950s high value stamps of Great Britai. The Queen's portrait is based on a work by <a href="https://en.wikipedia.org/wiki/Dorothy_Wilding" class="extiw" title="w:Dorothy Wilding">Dorothy Wilding</a>. The right stamp is printed by De la Rue and the left one by Bradbury Wilkinson or Waterlow
<a href="https://en.wikipedia.org/wiki/General_Post_Office" class="extiw" title="w:General Post Office">General Post Office</a>
1955
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