Examples of edge inscriptions or edge lettering include e pluribus unum on the edge of U.S. Presidential dollar coins, various national €2 edge inscriptions, and various phrases on the UK one pound coin, most commonly decus et tutamen. Inscriptions are more common on thicker, higher-value, or non-circulating coins.
Examples of patterns used on coin edges include:
Concise Oxford Dictionary (2006): mill, produce regular ribbed markings on the edge of (a coin) ↩
"About.com: "Reeded Edge Defined - What is a Reeded Edge?"". Archived from the original on 2015-12-11. Retrieved 2015-12-10. https://web.archive.org/web/20151211020033/http://coins.about.com/od/coinsglossary/g/reedededgedef.htm ↩
Why do some coins have ridges around the edges? https://archive.today/20130628102743/http://amazingfactsworld.com/why-do-some-coins-have-ridges-around-the-edges ↩