Beatty edge tools are refined, collectable and usable. Sometimes the tools are stamped with a bull emblem and they were manufactored in Chester, Pa. The term "cast steel" implies that a high grade carbon alloy steel was used. Usually the steel was laminated to a wrought iron or a pure iron body, today only Japanese chisels are produced in a similar manner. Cast steel was made in a small batch craft process that originated in Sheffield in the 18th century. Basically, pure iron was formed into bars, then case hardened, which adds carbon but unevenly, then the bars were broken up and melted in a crucible. The iron and carbon mix in the crucible producing uniform steel. Sounds simple but the techniques and proportions were a closely guarded secret and a famous case of pre-industrial revolution industrial espionage. Until the mid 1850's, when Henry Disston began steel making, all commercial tool steel was imported to the U.S. from England. Anyhow, take good care, sharpen cool and wet, you likely have a great chisel.