Brass reckoning counter, or jetton
Anglo-Gallic type, 14th-15th century
Jettons, laid out on a checker-board, were used as an aid to computation - in the manner of an abacus - at a time when Roman numerals were still in regular use. Anglo-Gallic jettons were made at the English mints in France with designs based on the French coinage. It is unlikely that Anglo-Gallic jettons were struck after 1453, the year of the final expulsion of the English from France.