Pit
Pit. A minute depression in the surface of a numismatic item; a small hole. In casting a small boss in the mold would cause a pit in the casting; a pit in the mold would cause a boss or nodule in the cast piece. See cast, casting.
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