NNP

Knurled, Knurling.  Small ridges, a series of raised ridge. It is the opposite of fluting, a series of indentations. The combination of knurls and flutes in series form the reeding on a reeded edge numismatic piece. Knurl work collectively is called knurling, and this is an often used term for reeding. See reeded edge.

excerpted with permission from

An Encyclopedia of Coin and Medal Technology

For Artists, Makers, Collectors and Curators

COMPILED AND WRITTEN BY D. WAYNE JOHNSON

Roger W. Burdette, Editor