De La Rue International Limited

Marianne Michelle Anton

Ralph Kay

Kenneth John Drinkwater

A security device comprises an optically variable effect generating structure ( ). An obscuring layer ( ) is located, in use, between the optically variable effect generating structure and a substrate ( ) to which the device is secured. A color layer ( ) is also included which exhibits one or more predetermined colors when viewed under certain viewing conditions from the side of the device remote from the obscuring layer. The obscuring layer ( ) is substantially opaque under the said certain viewing conditions.

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Hants, United Kingdom

Marianne Michelle Anton