Knurling

The knurling of a historical coin refers to the textured surface along the outer edge of a coin that was used in a historical context. Overall, the knurling of a historical coin is an important feature that contributes to the security, identification and historical categorisation of coins. From a scientific point of view, knurling is the deliberate embossing or engraving of a pattern on the edge of a coin. This pattern can consist of fluted lines, grooves, dots, patterns or inscriptions. Synonyms for knurling include the terms knurl, edge decoration, edge lettering or edge grinding. It helps to ensure authenticity by making manipulation, such as grinding or trimming the edge of the coin, more difficult. The knurling can also provide information about the year of minting, the country of issue or the mint.