The Duke of Edinburgh Prince Philip was honored with a new suite of Royal Mail stamps. With this new postage, the Royal Mail is paying tribute to his life.

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Prince Philip passed away in April at age 99. To commemorate his legacy, the Royal Mail of the U.K. has created four new stamps. These four stamps are grayscale photographs of the Duke of Edinburgh which present different points in his life.

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The first-class stamp presents a smiling face of the royal in uniform. The second-class stamp features a headshot of a young Philip. The third stamp represents Philip at the Royal Windsor horse show. The final stamp is a picture of the prince looking distinguished in uniform.

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The Royal Mail confirmed that the suite of stamps will go on sale on June 24. CEO of Royal Mail Simon Thompson said that it was an honor to showcase Philip’s life and legacy through the portrait stamps. Queen Elizabeth approved all U.K. stamp designs.

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Thompson said in a statement, “Throughout adulthood, The Duke of Edinburgh dedicated himself to the service of this country, the Commonwealth and to the many causes he was involved with. For more than seven decades he was at the center of our national life. His passing is a key moment in our history which we mark with this set of commemorative stamps.”