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In one image of her sheltering from the rain, Anne can be seen holding a khaki-coloured umbrella with a duck handle.
Similar to those produced by retailers James Smith & Sons, the pencil design appears like any other umbrella until you open it up.
As shown by Princess Royal, the handle of the accessory resembles a detailed duck head with fine carvings in the metal.
Though it is not confirmed to be a James Smith & Sons design, it could fetch somewhere in the region of £120, based on their website.
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