NNP

Split Collar.  A special collar which is engraved with letters or ornaments to form raised lettering on struck numismatic pieces. The collar, in three or more segments, rests within a retaining ring in coining position, and must be broken apart after each striking to retrieve the struck piece.  A more precise term is segmented collar.

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