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The Duchess of Cambridge added a personal touch to her Remembrance Day look.

Kate Middleton attended the annual Remembrance Sunday memorial service in London with the royal family wearing a unique version of the standard poppy brooch worn on the holiday.

Middleton chose the Code breakers Brooch for the ceremony, which according to the official Poppy Shop web site is “inspired by the rotors of the Enigma machines, from which Allied cryptologists successfully decrypted a vast number of enemy messages during the Second World War.”

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On #RemembranceSunday The Duke and Duchess of Cambridge joined Her Majesty The Queen and members of @TheRoyalFamily, as the nation honoured those who have lost their lives in conflict. The Duchess of Cambridge joined The Queen and The Duchess of Cornwall on the balcony of the Foreign Office for the National Service of Remembrance, as The Prince of Wales laid a wreath at the Cenotaph on behalf of The Queen, who is Head of the Armed Forces, followed by The Duke of Cambridge, The Duke of Sussex, The Duke of York, and Members of the Royal Family. Every year, the nation unites on Remembrance Sunday, traditionally held at 11am on the second Sunday in November, to honour the service and sacrifice of our Armed Forces community, the British and Commonwealth veterans, the Allies that fought alongside us and the civilian servicemen and women involved in the two World Wars and later conflicts 📷PA / Crown Copyright #WeWillRememberThem

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Middleton’s brooch choice is said to be a tribute to her grandmother Valerie Glassborow, who served in World War II as a code breaker at Bletchley Park, the primary center for Allied code breaking during the war. The operation was immortalized in the award-wining 2014 film “The Imitation Game.”

The brooch was released earlier this year, and this is the first time Middleton has worn it publicly. Middleton wore the brooch pinned to an Alexander McQueen military-inspired coat and with a veiled fascinator.

Click through the above gallery to see more photos of the British royal family on Remembrance Day.

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