Unsung Heroes: Codebreakers, signed by Turing
Unsung Heroes: Women of WW2 Bletchley Park, Codebreakers first day cover featuring five stamps and special Bombe Machine designed, Bletchley Park postmark 05.05.2022. Produced in partnership with Bletchley Park Trust. Autographed by Sir John Dermot Turing (Alan Turing's nephew) & author of books based on him & codebreaking.
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