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The first US quarters minted in 1796 ,1804,1805,1806 and 1807 were approximately 27.5 mm in diameter. Quarter minting was suspended until 1815 when the size was changed to 27 mm in diameter. This size quarter was minted until 1828 when quarter minting was again suspended. When it resumed again in 1831 the diameter had been changed to 24.3 mm and has been the standard for the US quarters until the present.

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16y ago

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