Listel. A narrow flat bar or fillet which on numismatic designs most often forms the base line separating the device from the exergue. Occasionally an artist's name, initials or monogram will be found below the listel, on the side – or very rarely – on top of the listel. In Spanish a “listel” is a rim, the raised border on a coin.
excerpted with permission from
For Artists, Makers, Collectors and Curators
COMPILED AND WRITTEN BY D. WAYNE JOHNSON
Roger W. Burdette, Editor