Marking. A British term for upsetting; also called rimming in Britain. The Jones Marking Machine was invented by London mintworker Meredith Jones in 1860 to prepare planchets that are deburred with a thickened edge for high speed coining.
excerpted with permission from
For Artists, Makers, Collectors and Curators
COMPILED AND WRITTEN BY D. WAYNE JOHNSON
Roger W. Burdette, Editor