Here are a couple of mid 18th Century images that show that dicing was something that started showing up in later part of the 1750's

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The caption says a little different, Im of the mind that this is an officer of the newly raised 2d Bn of the 42nd in 1758

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Ive lost my info on this image, if someone has the cite, Id love to have it again. Going to commission a knitter to make me a bonnet with this style of dicing here soon.