Norman Hartnell's 1953 coronation gown for Elizabeth II: white satin, nine designs, the Garter King of Arms refusing the daffodil for the leek, the Welsh Guards' cap badge

Six embroideresses worked on the gown in secret.

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The post, as it ran

01NORMAN HARTNELL'S 1953 CORONATION GOWN FOR QUEEN ELIZABETH II CARRIES A SECRET FOUR-LEAF SHAMROCK.

02THE QUEEN ASKED FOR WHITE SATIN. HARTNELL DREW NINE DESIGNS IN ALL.

03FOR WALES, THE GARTER KING OF ARMS REFUSED HIM A DAFFODIL AND INSISTED ON THE LEEK.

04HARTNELL WORKED HIS LEEK FROM THE CAP BADGE OF THE WELSH GUARDS.

05WITHOUT TELLING HER, HE EMBROIDERED AN EXTRA FOUR-LEAF SHAMROCK ON THE LEFT SIDE, FOR LUCK.