An ornament and a safeguard.

Line 262; inscription on some British one-pound coins up until 2015. The line was suggested by John Evelyn for the edge legend on the new milled coinage of Charles II of England from 1662 on to discourage clipping. He had seen it on the edge of a mirror belonging to Cardinal Richelieu (recorded in his book Numismata in 1697). The suggestion was adopted.